Fix #414: select, move and delete ruler guides with the selection tools

Guides dragged out of the rulers could not be touched again: no tool hit-tested
them, so a click on a guide went to the art under it.

- The Selection, Direct Selection and Group Selection tools pick a ruler guide
  within the selection tolerance (over the art; Direct Selection takes an
  anchor on it first) through a shared tools::rulerguide::GuideEdit. A drag
  moves the selected guides in one undo step (Alt copies them, Shift snaps the
  dragged one to the ruler's ticks, otherwise it snaps to pixels, the grid or,
  with Smart Guides, the art's edges, centres and anchors); dropped off the
  canvas onto its ruler, the guide is deleted. Hidden or locked guides can't be
  picked; the pointer shows which way a guide moves.
- Selection::guides holds the selected guides (on their own, like slices); the
  canvas draws them in the selection colour. Delete/Backspace (edit.clear)
  delete them, the arrow keys (object.nudge) nudge them, Lock Guides and Hide
  Guides deselect them.
- Commands for agents: guide.list, guide.select {indexes, toggle?},
  guide.move {dx?, dy?, copy?} (besides {index, pos}) and guide.remove {index?};
  guide positions out of range are refused. Documented in docs/mcp.md.
- Shift while dragging a new guide out of a ruler snaps it to the ticks too
  (Unit::ruler_step, shared with the rulers' drawing).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.github/workflows/release.yml

@@ -63,7 +63,7 @@ jobs:
   macos:
     name: macOS universal
     needs: version
-    runs-on: macos-15
+    runs-on: macos-release  # org larger runner (M2 Pro), release.yml@release only; capped by the actions_macos_xl budget
     environment: release
     env:
       VECTORCRAFT_VERSION: ${{ needs.version.outputs.version }}

AGENTS.md

@@ -55,3 +55,21 @@ Formerly **DrawCraft** (renamed 2026-10-01): old `.drawcraft` files and `"format
 - When a task lands, update it in the same PR: the milestone row, the parity-table row (score, missing items, hours), "Shipped so far", and the gap list if the gap closed or shrank.
 - Grade by behaviour against `plan/illustrator/`, not by whether a menu item exists. Scores are self-assessed, so err low.
 - Keep the README's Status section in step with the ROADMAP headline.
+
+## Contributor credits (About window)
+
+- About ▸ Contributors/Models are compiled into the binary from `contributors/contributors.json`
+  (commit stats; generated, never hand-edit) and `contributors/people.toml` (names people chose for
+  themselves). See `docs/contributors.md`.
+- **Agents working for a contributor:** when you prepare a PR, check whether your human's GitHub
+  username has a `[people.<username>]` entry in `contributors/people.toml`. If not, ask them once
+  whether they want to be credited by more than their username: a real name, a display name, and/or
+  their public GitHub profile name (`sync_github_name = true`). If yes, add **only their own** entry
+  (copy the template at the top of the file, or run
+  `python3 ../../craftrules/scripts/contributors.py --add-me . --real-name "…" --sync-github-name`)
+  and include it in their PR, committed as them. If no, change nothing: they are credited as
+  `@username` anyway.
+- Never add, edit, guess or copy anyone else's entry or name (not from git config, commit authors or
+  GitHub profiles). Never hand-edit `contributors.json`.
+- Maintainers refresh the stats with `python3 ../../craftrules/scripts/contributors.py .` (it also
+  re-verifies who wrote each `people.toml` entry; `--check` only verifies).

Cargo.lock

@@ -4690,6 +4690,7 @@ dependencies = [
  "log",
  "serde",
  "serde_json",
+ "toml",
  "vectorcraft-cad",
  "vectorcraft-color",
  "vectorcraft-doc",

ROADMAP.md

@@ -4,7 +4,7 @@ VectorCraft is a clean-room, open-source, pure-Rust reimplementation of the Adob
 
 This file tracks **how far we are and what's left**. Time estimates are wall-clock hours of continuous Claude Opus 5.5 agent work (including builds and the CI gate), given both for **one agent** and for **4–6 parallel agents** on disjoint crates. They are counted from the remaining work (see [Parity estimate](#parity-estimate)), calibrated against measured throughput, and updated as work lands.
 
-_Last updated: 2026-10-08 (after M4.14–M4.98, M8.1–M8.20, M14.4–M14.7, the MCP prompts, resource templates, completions and logging, the 2026-10-07 issue fixes, the Layers panel rework and the 2026-10-08 community contributions: Pen and shape-tool modifiers, path editing, Layers, Artboards, Swatches/Brushes and dialogs, Japanese composition and PDF text, Hebrew/Arabic type, interface languages (Spanish among them), the font menu, saved selections, MCP and EPS, the missing-font export warning (#319), open paths in the Shape Builder (#374), PDF/`.ai` import keeping strokes live and hidden and nested layers (#372), per-corner Live Corners (#381), SVG type opening at the size it draws at (#396) and the Wayland clipboard with copied-file paste (#398); see [Honest assessment](#honest-assessment-2026-10-05))._
+_Last updated: 2026-10-08 (after M4.14–M4.98, M8.1–M8.20, M14.4–M14.7, the MCP prompts, resource templates, completions and logging, the 2026-10-07 issue fixes, the Layers panel rework and the 2026-10-08 community contributions: Pen and shape-tool modifiers, path editing, Layers, Artboards, Swatches/Brushes and dialogs, Japanese composition and PDF text, Hebrew/Arabic type, interface languages (Spanish among them), the font menu, saved selections, MCP and EPS, the missing-font export warning (#319), open paths in the Shape Builder (#374), PDF/`.ai` import keeping strokes live and hidden and nested layers (#372), per-corner Live Corners (#381), SVG type opening at the size it draws at (#396), the Wayland clipboard with copied-file paste (#398), ruler guides that can be selected, moved and deleted (#414) and the first Preferences options that were stored but unused (#394); see [Honest assessment](#honest-assessment-2026-10-05))._
 
 ## Where we are
 
@@ -103,6 +103,7 @@ grade by behaviour against `plan/illustrator/`, not by whether a menu item exist
   - A canvas context menu: right-click selects the object under the pointer and lists what applies to the selection (Undo/Redo, clipboard, group, isolation, join, Remove Anchor Points when anchors are selected, masks, compound paths, guides, Transform, Arrange, Select, Export Selection), or the view commands on empty canvas.
   - Save / Don't Save / Cancel before closing or quitting with unsaved documents (tabs, Close, Close All, Quit, window close).
   - Four brightness themes, persistent preferences.
+  - Preferences that act (#394, in part): Show Tool Tips, Double Click To Isolate, Zoom with Mouse Wheel (the wheel zooms about the pointer, Shift-wheel scrolls up and down, Cmd/Ctrl-wheel sideways), Use Precise Cursors; Selection & Anchor Display › Tolerance (objects, anchors and handles), Object Selection by Path Only, Command Click to Select Objects Behind (cycling down the stack), Zoom to Selection, anchor Size, Highlight anchors on mouse over; Type › Number of Recent Fonts (up to 15); Guides & Grid › guide and grid Color and Style (lines or dots) and Grids In Back. They reach agents too (`prefs.set`, then `pointer_gesture`; `ui.wheel` on the control channel). About 55 stored options still do nothing yet (the rest of #394).
   - Dialogs open with their first field focused and its value selected: type a value and press Enter (Move, Rotate, Scale…). Number fields in panels and dialogs step with Up/Down (Shift: ten, Ctrl/Cmd: a tenth of their unit), applied at once.
   - Tab shows and hides the panels (in the Type tool it types a tab) without moving the keyboard focus onto a field, so the next shortcut or letter still works; in dialogs and panel fields it moves between fields.
   - Cmd/Ctrl+A follows the keyboard: in a panel, dialog or search field it selects the field's text, while the Type tool edits it selects all of that text (also `select.all` over MCP), and only otherwise every object. On macOS the menu bar's Select All, Cut, Copy and Paste (keys or clicks) act on a focused field too. Not yet: Select All across threaded frames (one frame's text is selected).
@@ -123,7 +124,7 @@ grade by behaviour against `plan/illustrator/`, not by whether a menu item exist
   - **Panel drag and drop:** art dragged off the canvas onto the Symbols panel becomes a symbol, onto the Swatches panel a pattern swatch and onto the Brushes panel an Art brush; a symbol dragged onto the canvas places an instance where it is dropped, and a brush dragged onto a path is applied to it.
   - **Tool double-clicks:** double-clicking a tool's button opens its options: Hand fits the artboard in the window, Zoom shows 100 %, Rotate, Scale, Reflect and Shear open their Object › Transform dialogs, the Selection, Direct Selection and Group Selection tools the Move dialog (Enter opens these seven tools' dialogs too), Gradient, Eyedropper, Blend and the Liquify tools their panels or options, and the Pencil, Paintbrush, Smooth, Blob Brush and Eraser tools their Tool Options (Fidelity, fill, the tolerances, the brush size).
 - **Layers panel:** every layer, sublayer, group and object is a clickable row at any depth: a click highlights it and makes its layer current (new art goes there), Shift-click a range, Ctrl/Cmd-click toggles. Sublayers are no longer treated as objects: clicks, marquees, Select All and the Select menu take the art inside them, and each sublayer selects in its own colour. Selection squares on rows with selected art (click selects a row's art, Shift adds or removes; dragging the square moves the selection to another row, Alt copies), the eye and lock on every row with drag-down-the-column (one undo step), Ctrl/Cmd-click an eye for per-layer Outline, Alt-click an eye or lock to hide or lock the other layers (again: show or unlock them all), triangles with Alt to open or close everything inside, drag and drop rows above, below or into layers and groups with a drop line (Alt copies, the trash deletes), inline rename, Delete key on highlighted rows. Buttons and the full panel menu: New Layer/Sublayer (Alt: options, Ctrl: on top), Duplicate, Delete, Options for Selection, clipping mask, isolation, Locate Object, Merge Selected, Flatten Artwork, Collect in New Layer, Release to Layers (Sequence and Build), Reverse Order, Template, Hide/Outline/Lock Others and Show/Preview/Unlock All, Paste Remembers Layers, Panel Options (row size, thumbnails per kind, Show Layers Only). Layer Options: name, colour (presets or custom), Template, Lock, Show, Print, Preview (outline drawing and clicking) and Dim Images to %. Every operation is a command (`layer.move`, `layer.highlight`, `layer.merge`…) with validation against cycles and invalid nesting.
-- **Drawing aids:** Smart Guides and snapping (moving, and resizing by the bounding-box handles: the dragged edges align with the other objects; the Artboard tool snaps artboards, and their bleed, to other artboards, bleeds and art, the grid or whole pixels while moving, copying and resizing them, and the Transform panel shows and edits the active artboard's X/Y/W/H), guides dragged out of the rulers, and Draw Normal / Behind / Inside modes.
+- **Drawing aids:** Smart Guides and snapping (moving, and resizing by the bounding-box handles: the dragged edges align with the other objects; the Artboard tool snaps artboards, and their bleed, to other artboards, bleeds and art, the grid or whole pixels while moving, copying and resizing them, and the Transform panel shows and edits the active artboard's X/Y/W/H), guides dragged out of the rulers (Shift snaps them to the ruler's ticks) that the Selection, Direct Selection and Group Selection tools then pick and drag (#414: the selected guides highlight and move together, Alt copies them, Shift snaps the dragged one to the ticks, otherwise it snaps to pixels, the grid or the art's edges, centres and anchors; the arrow keys nudge them, Delete deletes them, dragging one back onto its ruler deletes it, Lock Guides and Hide Guides leave them alone; `guide.list`, `guide.select`, `guide.move` and `guide.remove` reach agents), and Draw Normal / Behind / Inside modes.
 - **Views:** the status bar's artboard navigator (first, previous, next, last; `view.goToArtboard`) goes to an artboard and fits it, and Fit Artboard in Window and Actual Size show the navigator's artboard. The Artboards panel highlights that active artboard: clicking a row makes it active (the Artboard tool's too, while it is chosen) as does clicking an artboard with the Artboard tool, double-clicking its number also fits it in the window and double-clicking its name renames it.
 - **Geometry and effects:**
   - Pathfinder (10 exact curve booleans), Offset, Outline Stroke, Simplify, Clean Up, Split Into Grid, Divide Objects Below. Object › Path › Remove Anchor Points (`path.removeAnchors`) removes the direct-selected anchors without opening their paths (the Delete key still deletes them with their segments): the neighbours keep their handle directions and their facing handles are refitted so one cubic follows the two old segments, and straight sides stay straight. The Delete Anchor Point tool uses the same refit. The Control bar, the contextual task bar, the Properties quick actions and the canvas context menu offer it when anchors are selected.
@@ -205,12 +206,12 @@ about 1–1.5 agent-hours each, so the other rows (estimated on the older scale)
 | Image Trace, graphs, image tools | 3 | 70% | graph Design/Column/Marker, Create Object Mosaic, Crop Image polish (Vector Halftone is done) | 6–10 |
 | Layers, artboards, document setup | 5 | 82% | Layers panel: a confirmation before deleting layers that hold art, Collect for Export, row context menus, the Layer Options dialog for several rows with mixed values, Paste Remembers Layers for sublayers, drag-scrolling a long panel while dragging rows; artboard presets/rearrange polish (Document Setup, New Document and the rest of the Layers panel are done) | 4–7 |
 | View & navigation | 3 | 70% | New View/Edit Views, multiple windows/arrange, Snap to Pixel/Glyph (print tiling is done) | 9–14 |
-| Guides, grids, smart guides, snapping, rulers | 3 | 75% | global/video rulers, smart-guide preference depth, ruler-drag modifiers (Shift snaps to ticks, Alt swaps orientation) and dragging existing guides | 4–8 |
+| Guides, grids, smart guides, snapping, rulers | 3 | 80% | global/video rulers, smart-guide preference depth, Alt swapping a ruler guide's orientation, ruler guides selected together with art (marquee, Shift-click) and on layers (dragging existing guides is done, #414) | 3–6 |
 | File formats | 6 | 85% | DWG (no open spec: DXF instead), PSD placement as layers, Illustrator EPS checked against more real files (two Illustrator 30 files open as vectors so far), the remaining fidelity polish; EPS, DXF, EMF/WMF, TIFF, BMP, Targa, PSD export, SVGZ, PDF security, PDF/X, PDF layers and presets are done | 6–10 |
 | Export for Screens, Asset Export, slices, Save for Web | 3 | 85% | polish only (all four are done) | 2–4 |
 | Print, colour management, separations, flattener | 3 | 80% | print preview fidelity (flattener presets in PDF and print, overprint in PDF and composite print, Print dialog, presets, PostScript, marks, separations, Print Tiling, print overprint/flattener/bitmap options and printer profile are done) | 1–2 |
 | Automation | 3 | 60% | Variables (data merge), scripting surface, batch | 8–12 |
-| UI chrome (panels, contextual Properties, workspaces, prefs) | 6 | 78% | Variables, SVG Interactivity, Properties per context, Consolidate All Windows, context menus beyond the canvas (Links, Asset Export, CSS Properties, Attributes and the canvas context menu are done) | 15–25 |
+| UI chrome (panels, contextual Properties, workspaces, prefs) | 6 | 78% | Variables, SVG Interactivity, Properties per context, Consolidate All Windows, context menus beyond the canvas (Links, Asset Export, CSS Properties, Attributes and the canvas context menu are done), about 55 Preferences options stored but not yet acted on (#394: smart guide display options, type increments and options, units, Show Pixel Grid, Snap to Point, rubber band, handle style, performance, devices…) | 18–28 |
 | Libraries, Links, Package | 2 | 50% | a local Libraries panel (no cloud by design); Links and Package are done | 5–8 |
 | **Feature parity** | **103** | **~75%** | | **~210–330** |
 | Interaction-fidelity pass (side by side with Illustrator: every tool modifier, cursor, dialog, Properties context) | | | | 60–90 |

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+      "lines_added": 76,
+      "lines_deleted": 21,
+      "binary_added": 0,
+      "binary_deleted": 0,
+      "first_commit": "2026-10-07T23:09:37Z",
+      "last_commit": "2026-10-07T23:09:37Z"
+    }
+  ],
+  "models": [
+    {
+      "id": "anthropic/claude-opus/5.5",
+      "company": "Anthropic",
+      "model": "Claude Opus",
+      "version": "5.5",
+      "commits": 567,
+      "lines_added": 382239,
+      "lines_deleted": 67174
+    },
+    {
+      "id": "anthropic/claude-sonnet/5.5",
+      "company": "Anthropic",
+      "model": "Claude Sonnet",
+      "version": "5.5",
+      "commits": 6,
+      "lines_added": 660,
+      "lines_deleted": 34
+    },
+    {
+      "id": "anthropic/claude-opus/4.8",
+      "company": "Anthropic",
+      "model": "Claude Opus",
+      "version": "4.8",
+      "commits": 3,
+      "lines_added": 1672,
+      "lines_deleted": 42
+    },
+    {
+      "id": "anthropic/claude-fable/5.1",
+      "company": "Anthropic",
+      "model": "Claude Fable",
+      "version": "5.1",
+      "commits": 1,
+      "lines_added": 6809,
+      "lines_deleted": 2627
+    }
+  ]
+}

contributors/people.toml

@@ -0,0 +1,23 @@
+# Contributor names for the About window (craftrules standards/contributors.md).
+#
+# Everyone who contributes is credited by GitHub username automatically. Anything more is up to
+# you: add YOUR OWN entry below, in your own PR (commit it yourself). Never add someone else; a
+# maintainer may add a person only when that person asked, recording where in consent_source.
+#
+# Easiest: python3 ../../craftrules/scripts/contributors.py --add-me . \
+#            [--real-name "Ada Lovelace"] [--display-name "Ada"] [--sync-github-name]
+#
+# Or copy this block, replacing your-github-username (every field is optional):
+#
+#   [people.your-github-username]
+#   real_name = "Your Name"        # shown when the viewer picks "Real name"
+#   display_name = "Nickname"      # shown when the viewer picks "Display name"
+#   sync_github_name = true        # or: use the name on your public GitHub profile as display name
+#
+# To remove your names, delete your entry (or set fields empty) in a PR. The next
+# contributors.py run, and the next build, drop them.
+
+[people.echelon]
+real_name = "Brandon Thomas"
+display_name = "Brandon Thomas"
+sync_github_name = false

crates/doc/src/hit.rs

@@ -60,6 +60,25 @@ impl Default for HitOptions {
 
 /// Topmost editable object under `p`.
 pub fn hit_test(doc: &Document, p: Point, opt: HitOptions) -> Option<Hit> {
+    hit_test_skipping(doc, p, opt, &|_| false)
+}
+
+/// The objects under `p` that [`Hit::top_object`] picks in `scope` (isolation mode), topmost
+/// first: what clicks there select, one below the other (Cmd/Ctrl-click selects behind).
+pub fn objects_at(doc: &Document, p: Point, opt: HitOptions, scope: Option<NodeId>) -> Vec<NodeId> {
+    let mut tops: Vec<NodeId> = vec![];
+    // Each round leaves out the objects found so far (and everything inside them).
+    while let Some(top) = hit_test_skipping(doc, p, opt, &|id| tops.contains(&id)).map(|h| h.top_object(scope)) {
+        if tops.contains(&top) {
+            break;
+        }
+        tops.push(top);
+    }
+    tops
+}
+
+/// [`hit_test`] passing over the nodes `skip` names (and their contents).
+fn hit_test_skipping(doc: &Document, p: Point, opt: HitOptions, skip: &dyn Fn(NodeId) -> bool) -> Option<Hit> {
     let mut chain = Vec::new();
     for layer in doc.layers.iter().rev() {
         if !layer.visible || layer.locked {
@@ -74,7 +93,7 @@ pub fn hit_test(doc: &Document, p: Point, opt: HitOptions) -> Option<Hit> {
         }
         chain.push(layer.id);
         let opt = if matches!(layer.kind, NodeKind::Layer { preview: false, .. }) { HitOptions { outline: true, ..opt } } else { opt };
-        if let Some(mut h) = hit_children(layer, p, opt, &mut chain) {
+        if let Some(mut h) = hit_children(layer, p, opt, skip, &mut chain) {
             h.contents_of = h.ancestry.iter().rev().copied().find(|a| doc.node(*a).is_some_and(edits_contents));
             h.layers = h.ancestry.iter().take_while(|a| doc.node(**a).is_some_and(Node::is_layer)).count();
             return Some(h);
@@ -99,7 +118,7 @@ fn clip_contains(clip: &Node, p: Point) -> bool {
     clip.clip_shapes(Some(&frame)).iter().any(|(bp, rule)| fill_contains(bp, *rule, p))
 }
 
-fn hit_children(parent: &Node, p: Point, opt: HitOptions, chain: &mut Vec<NodeId>) -> Option<Hit> {
+fn hit_children(parent: &Node, p: Point, opt: HitOptions, skip: &dyn Fn(NodeId) -> bool, chain: &mut Vec<NodeId>) -> Option<Hit> {
     let children = parent.children()?;
     // A clip group (or a layer with a clipping mask) only hits inside its clipping path.
     if parent.clips()
@@ -110,7 +129,7 @@ fn hit_children(parent: &Node, p: Point, opt: HitOptions, chain: &mut Vec<NodeId
     }
     for c in children.iter().rev() {
         // Hidden, locked and template sublayers block clicks like top-level layers do.
-        if !c.visible || c.locked || c.is_template() {
+        if !c.visible || c.locked || c.is_template() || skip(c.id) {
             continue;
         }
         // (An envelope's content sits where it was, not where the envelope draws it.)
@@ -123,13 +142,13 @@ fn hit_children(parent: &Node, p: Point, opt: HitOptions, chain: &mut Vec<NodeId
         chain.push(c.id);
         let hit = match &c.kind {
             // A sublayer whose Preview is off is clicked in outline, like an outline view.
-            NodeKind::Layer { preview: false, .. } => hit_children(c, p, HitOptions { outline: true, ..opt }, chain),
-            NodeKind::Layer { .. } | NodeKind::Group { .. } => hit_children(c, p, opt, chain),
+            NodeKind::Layer { preview: false, .. } => hit_children(c, p, HitOptions { outline: true, ..opt }, skip, chain),
+            NodeKind::Layer { .. } | NodeKind::Group { .. } => hit_children(c, p, opt, skip, chain),
             // Edit Contents: the envelope's content hits, undistorted.
-            NodeKind::Envelope { editing: true, .. } => hit_children(c, p, opt, chain),
+            NodeKind::Envelope { editing: true, .. } => hit_children(c, p, opt, skip, chain),
             // A blend's key objects first (Direct and Group Selection pick them); its steps hit
             // as the blend.
-            NodeKind::Blend { .. } => hit_children(c, p, opt, chain)
+            NodeKind::Blend { .. } => hit_children(c, p, opt, skip, chain)
                 .or_else(|| hit_leaf(c, p, opt).map(|kind| Hit { leaf: c.id, ancestry: chain.clone(), kind, contents_of: None, layers: 1 })),
             _ => hit_leaf(c, p, opt).map(|kind| Hit { leaf: c.id, ancestry: chain.clone(), kind, contents_of: None, layers: 1 }),
         };
@@ -169,7 +188,7 @@ fn hit_leaf(n: &Node, p: Point, opt: HitOptions) -> Option<HitKind> {
             if let Some(k) = hit_stroke(n, &bp, *rule, p, opt) {
                 return Some(k);
             }
-            (!opt.outline && fill_contains(&bp, *rule, p)).then_some(HitKind::Fill)
+            (!opt.outline && !opt.path_only && fill_contains(&bp, *rule, p)).then_some(HitKind::Fill)
         }
         NodeKind::Text(_) | NodeKind::Image(_) | NodeKind::SymbolInstance { .. } | NodeKind::Blend { .. } | NodeKind::Envelope { .. } => {
             n.geometric_bounds().filter(|b| b.inflate(opt.tol, opt.tol).contains(p)).map(|_| HitKind::Bounds)
@@ -366,6 +385,46 @@ mod tests {
         assert!(hit_test(&d, Point::new(0.5, 25.0), HitOptions::default()).is_some());
     }
 
+    /// Object Selection by Path Only: a filled path or compound path hits on its outline only.
+    #[test]
+    fn path_only_leaves_out_fills() {
+        let mut d = Document::new(200.0, 200.0);
+        let l = d.layers[0].id;
+        let (a, c) = (d.alloc_id(), d.alloc_id());
+        d.insert(Some(l), 0, Node::path(a, shapes::rectangle(Rect::new(0.0, 0.0, 50.0, 50.0)), Appearance::default_art())).unwrap();
+        let inner = Node::path(d.alloc_id(), shapes::rectangle(Rect::new(100.0, 0.0, 150.0, 50.0)), Appearance::default());
+        let mut compound = Node::new(c, NodeKind::Compound { children: vec![Arc::new(inner)], rule: vectorcraft_geom::FillRule::NonZero });
+        compound.appearance = Appearance::default_art();
+        d.insert(Some(l), 9, compound).unwrap();
+        let path_only = HitOptions { path_only: true, ..Default::default() };
+        for (id, inside, edge) in [(a, Point::new(25.0, 25.0), Point::new(0.5, 25.0)), (c, Point::new(125.0, 25.0), Point::new(100.5, 25.0))] {
+            assert_eq!(hit_test(&d, inside, HitOptions::default()).map(|h| h.leaf), Some(id), "the fill hits");
+            assert!(hit_test(&d, inside, path_only).is_none(), "path only: the fill of {id:?} doesn't hit");
+            assert_eq!(hit_test(&d, edge, path_only).map(|h| h.leaf), Some(id), "path only: the outline does");
+        }
+    }
+
+    /// `objects_at`: every object under the point, topmost first; a group counts once.
+    #[test]
+    fn objects_at_lists_the_stack() {
+        let mut d = Document::new(200.0, 200.0);
+        let l = d.layers[0].id;
+        let rect =
+            |d: &mut Document, x: f64| Node::path(d.alloc_id(), shapes::rectangle(Rect::new(x, 0.0, x + 50.0, 50.0)), Appearance::default_art());
+        let a = rect(&mut d, 0.0);
+        let (b, c) = (rect(&mut d, 10.0), rect(&mut d, 20.0));
+        let (a_id, b_id, c_id, g) = (a.id, b.id, c.id, d.alloc_id());
+        d.insert(Some(l), 0, a).unwrap();
+        d.insert(Some(l), 9, Node::group(g, vec![Arc::new(b), Arc::new(c)])).unwrap();
+        let far = rect(&mut d, 120.0);
+        d.insert(Some(l), 9, far).unwrap();
+        let at = |x: f64, scope| objects_at(&d, Point::new(x, 25.0), HitOptions::default(), scope);
+        assert_eq!(at(30.0, None), vec![g, a_id]);
+        assert_eq!(at(30.0, Some(g))[..2], [c_id, b_id], "isolated: the group's own objects");
+        assert_eq!(at(5.0, None), vec![a_id]);
+        assert!(at(90.0, None).is_empty());
+    }
+
     #[test]
     fn locked_and_hidden_skip() {
         let mut d = Document::new(200.0, 200.0);

crates/doc/src/lib.rs

@@ -167,6 +167,18 @@ impl Unit {
             Unit::Feet => "Feet",
         }
     }
+    /// The rulers' label step at `zoom` (screen pixels per point), in this unit: the first of
+    /// 1, 2, 5 × 10ⁿ that puts labels at least 50 pixels apart. Ticks mark every tenth of it.
+    pub fn ruler_step(self, zoom: f64) -> f64 {
+        const STEPS: [f64; 19] =
+            [0.01, 0.02, 0.05, 0.1, 0.2, 0.5, 1.0, 2.0, 5.0, 10.0, 25.0, 50.0, 100.0, 200.0, 500.0, 1000.0, 2000.0, 5000.0, 10000.0];
+        STEPS.iter().copied().find(|s| s * self.points() * zoom >= 50.0).unwrap_or(10000.0)
+    }
+    /// `v` (points) on the nearest ruler tick at `zoom` ([`Self::ruler_step`]).
+    pub fn snap_to_ruler_tick(self, v: f64, zoom: f64) -> f64 {
+        let tick = self.ruler_step(zoom) / 10.0 * self.points();
+        (v / tick).round() * tick
+    }
     pub fn from_pt(self, v: f64) -> f64 {
         v / self.points()
     }

crates/doc/src/selection.rs

@@ -1,4 +1,4 @@
-//! Selection state (objects and, for direct selection, individual anchors).
+//! Selection state (objects and, for direct selection, individual anchors; ruler guides).
 
 use std::collections::{BTreeMap, BTreeSet};
 
@@ -29,12 +29,20 @@ pub struct Selection {
     /// clears them.
     #[serde(default, skip_serializing_if = "Vec::is_empty")]
     pub slices: Vec<NodeId>,
+    /// Ruler guides selected with a selection tool, as indexes into [`Document::guides`]. They are
+    /// selected on their own: any change to the object selection clears them.
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    pub guides: Vec<usize>,
 }
 
 impl Selection {
     pub fn is_empty(&self) -> bool {
         self.objects.is_empty()
     }
+    /// Is anything selected that Delete and the arrow keys act on: objects or ruler guides?
+    pub fn has_objects_or_guides(&self) -> bool {
+        !self.objects.is_empty() || !self.guides.is_empty()
+    }
     pub fn len(&self) -> usize {
         self.objects.len()
     }
@@ -47,6 +55,7 @@ impl Selection {
         self.key = None;
         self.target = None;
         self.slices.clear();
+        self.guides.clear();
     }
     pub fn set(&mut self, ids: impl IntoIterator<Item = NodeId>) {
         self.clear();
@@ -57,6 +66,7 @@ impl Selection {
     pub fn add(&mut self, id: NodeId) {
         self.target = None;
         self.slices.clear();
+        self.guides.clear();
         if !self.objects.contains(&id) {
             self.objects.push(id);
         }
@@ -64,6 +74,7 @@ impl Selection {
     pub fn remove(&mut self, id: NodeId) {
         self.target = None;
         self.slices.clear();
+        self.guides.clear();
         self.objects.retain(|x| *x != id);
         self.anchors.remove(&id);
         if self.key == Some(id) {
@@ -79,6 +90,15 @@ impl Selection {
             }
         }
     }
+    /// Select ruler guides `indexes` (see [`Selection::guides`]) and nothing else.
+    pub fn set_guides(&mut self, indexes: impl IntoIterator<Item = usize>) {
+        self.clear();
+        for i in indexes {
+            if !self.guides.contains(&i) {
+                self.guides.push(i);
+            }
+        }
+    }
     pub fn toggle(&mut self, id: NodeId) {
         if self.contains(id) { self.remove(id) } else { self.add(id) }
     }
@@ -97,6 +117,7 @@ impl Selection {
             self.target = None;
         }
         self.slices.retain(|id| doc.is_slice(*id));
+        self.guides.retain(|i| *i < doc.guides.len());
     }
     /// Target `id` (see [`Selection::target`]): a layer gets its visible, unlocked art selected
     /// (the art of its sublayers too), anything else is selected itself.
@@ -138,6 +159,23 @@ mod tests {
         assert!(s.is_empty());
     }
 
+    #[test]
+    fn guides_are_selected_on_their_own() {
+        let mut s = Selection::default();
+        s.add(NodeId(1));
+        s.set_guides([2, 0, 2]);
+        assert_eq!((s.objects.clone(), s.guides.clone()), (vec![], vec![2, 0]));
+        assert!(s.has_objects_or_guides() && s.is_empty());
+        s.add(NodeId(1));
+        assert!(s.guides.is_empty());
+        // Pruning drops guides the document no longer has.
+        let mut d = Document::new(100.0, 100.0);
+        d.guides.push(crate::Guide { vertical: true, pos: 10.0 });
+        s.set_guides([0, 1]);
+        s.prune(&d);
+        assert_eq!(s.guides, vec![0]);
+    }
+
     #[test]
     fn selection_changes_clear_the_target() {
         let mut s = Selection::default();

crates/engine/src/cmd/docmenu.rs

@@ -155,8 +155,34 @@ pub fn specs() -> Vec<CommandSpec> {
             clear_guides
         ),
         cmd!("guide.add", "Add Guide", [], None, "{vertical: bool, pos: pt (x for vertical, y for horizontal)} → {index}", has_doc, guide_add),
-        cmd!("guide.remove", "Remove Guide", [], None, "{index}", guides_unlocked, guide_remove),
-        cmd!("guide.move", "Move Guide", [], None, "{index, pos: pt}", guides_unlocked, guide_move),
+        cmd!(query "guide.list", "Guides", [], None, "{} → [{index, vertical, pos, selected}…] the ruler guides", has_doc, guide_list),
+        cmd!(
+            "guide.select",
+            "Select Guides",
+            [],
+            None,
+            "{indexes: [index…], toggle?: bool} select ruler guides on their own (deselecting the art); toggle adds or removes them instead → {selected: [index…]}",
+            guides_unlocked,
+            guide_select
+        ),
+        cmd!(
+            "guide.remove",
+            "Remove Guide",
+            [],
+            None,
+            "{index?} delete ruler guide `index`, else the selected ones (as Delete / edit.clear does) → {count}",
+            guides_unlocked,
+            guide_remove
+        ),
+        cmd!(
+            "guide.move",
+            "Move Guide",
+            [],
+            None,
+            "{index, pos: pt} put ruler guide `index` at `pos` | {dx?, dy?: pt, copy?: bool} move the selected guides (vertical ones by dx, horizontal ones by dy); copy leaves them and selects the moved copies",
+            guides_unlocked,
+            guide_move
+        ),
         cmd!("file.closeAll", "Close All", ["File"], Some("Cmd+Alt+W"), "{} → {closed}", has_doc, close_all),
         cmd!(
             "file.documentColorMode",
@@ -428,6 +454,10 @@ fn release_guides(s: &mut Session, _: &Value) -> Result<Value> {
 fn lock_guides(s: &mut Session, p: &Value) -> Result<Value> {
     let v = p.get("locked").and_then(Value::as_bool).unwrap_or(!s.menu.guides_locked);
     s.menu.guides_locked = v;
+    // Locked guides can't stay selected.
+    if v && !s.doc()?.selection.guides.is_empty() {
+        s.select(|_, sel| sel.guides.clear())?;
+    }
     Ok(json!({ "locked": v }))
 }
 
@@ -458,28 +488,95 @@ fn guide_add(s: &mut Session, p: &Value) -> Result<Value> {
     Ok(json!({ "index": i }))
 }
 
-fn guide_index(s: &Session, p: &Value, cmd: &str) -> Result<usize> {
-    let i = p.get("index").and_then(Value::as_u64).ok_or_else(|| bad(cmd, "missing index"))? as usize;
+fn guide_list(s: &mut Session, _: &Value) -> Result<Value> {
+    let st = s.doc()?;
+    let row = |(i, g): (usize, &Guide)| json!({ "index": i, "vertical": g.vertical, "pos": g.pos, "selected": st.selection.guides.contains(&i) });
+    Ok(Value::Array(st.doc.guides.iter().enumerate().map(row).collect()))
+}
+
+/// Ruler guide `index` of the active document (`index` validated).
+fn guide_index(s: &Session, v: Option<&Value>, cmd: &str) -> Result<usize> {
+    let i = v.and_then(Value::as_u64).and_then(|i| usize::try_from(i).ok()).ok_or_else(|| bad(cmd, "an index must be a whole number"))?;
     if i >= s.doc()?.doc.guides.len() {
-        return Err(bad(cmd, "no such guide"));
+        return Err(bad(cmd, format!("no guide {i}")));
     }
     Ok(i)
 }
 
-fn guide_remove(s: &mut Session, p: &Value) -> Result<Value> {
-    let i = guide_index(s, p, "guide.remove")?;
-    s.edit("Delete Guide", |d, _| {
-        d.guides.remove(i);
-        Ok(())
-    })?;
-    ok()
+fn guide_select(s: &mut Session, p: &Value) -> Result<Value> {
+    let list = p.get("indexes").and_then(Value::as_array).ok_or_else(|| bad("guide.select", "missing indexes"))?;
+    let picked = list.iter().map(|v| guide_index(s, Some(v), "guide.select")).collect::<Result<Vec<_>>>()?;
+    if bool_or(p, "toggle", false) {
+        let mut now = s.doc()?.selection.guides.clone();
+        for i in picked {
+            if let Some(k) = now.iter().position(|g| *g == i) {
+                now.remove(k);
+            } else {
+                now.push(i);
+            }
+        }
+        s.select(|_, sel| sel.set_guides(now))?;
+    } else {
+        s.select(|_, sel| sel.set_guides(picked))?;
+    }
+    Ok(json!({ "selected": s.doc()?.selection.guides }))
 }
 
-fn guide_move(s: &mut Session, p: &Value) -> Result<Value> {
-    let i = guide_index(s, p, "guide.move")?;
-    let pos = f64_req(p, "pos", "guide.move")?;
-    s.edit("Move Guide", |d, _| {
-        d.guides[i].pos = pos;
+/// Delete ruler guide `index`, else the selected guides, in one undo step → {count}.
+pub(crate) fn guide_remove(s: &mut Session, p: &Value) -> Result<Value> {
+    let gone: Vec<usize> = match p.get("index") {
+        Some(v) => vec![guide_index(s, Some(v), "guide.remove")?],
+        None => s.doc()?.selection.guides.clone(),
+    };
+    if gone.is_empty() {
+        return Err(bad("guide.remove", "no guide selected"));
+    }
+    let label = if gone.len() == 1 { "Delete Guide" } else { "Delete Guides" };
+    s.edit(label, |d, sel| {
+        let kept = |i: &usize| !gone.contains(i);
+        // The guides left selected keep their place among the rest.
+        let left: Vec<usize> = sel.guides.iter().filter(|i| kept(i)).map(|i| i - gone.iter().filter(|g| *g < i).count()).collect();
+        d.guides = std::mem::take(&mut d.guides).into_iter().enumerate().filter(|(i, _)| kept(i)).map(|(_, g)| g).collect();
+        sel.set_guides(left);
+        Ok(())
+    })?;
+    Ok(json!({ "count": gone.len() }))
+}
+
+/// Put ruler guide `index` at `pos`, else move (or copy) the selected guides, in one undo step.
+pub(crate) fn guide_move(s: &mut Session, p: &Value) -> Result<Value> {
+    if let Some(v) = p.get("index") {
+        let i = guide_index(s, Some(v), "guide.move")?;
+        let pos = f64_req(p, "pos", "guide.move")?;
+        s.edit("Move Guide", |d, _| {
+            if let Some(g) = d.guides.get_mut(i) {
+                g.pos = pos;
+            }
+            Ok(())
+        })?;
+        return ok();
+    }
+    let moving = s.doc()?.selection.guides.clone();
+    if moving.is_empty() {
+        return Err(bad("guide.move", "no guide selected (or give an index)"));
+    }
+    let (dx, dy, copy) = (f64_or(p, "dx", 0.0), f64_or(p, "dy", 0.0), bool_or(p, "copy", false));
+    s.edit(if copy { "Copy Guide" } else { "Move Guide" }, |d, sel| {
+        let mut copies = vec![];
+        for &i in &moving {
+            let Some(g) = d.guides.get_mut(i) else { continue };
+            let moved = Guide { vertical: g.vertical, pos: g.pos + if g.vertical { dx } else { dy } };
+            if copy {
+                copies.push(moved);
+            } else {
+                *g = moved;
+            }
+        }
+        if copy {
+            let first = d.guides.len();
+            d.guides.extend(copies);
+            sel.set_guides(first..d.guides.len());
+        }
         Ok(())
     })?;
     ok()

crates/engine/src/cmd/edit.rs

@@ -85,7 +85,15 @@ pub fn specs() -> Vec<CommandSpec> {
             has_clipboard,
             |s, p| paste(s, p, PasteMode::AllArtboards)
         ),
-        cmd!("edit.clear", "Clear", ["Edit"], Some("Delete"), "{ids?}", has_selection, clear),
+        cmd!(
+            "edit.clear",
+            "Clear",
+            ["Edit"],
+            Some("Delete"),
+            "{ids?} delete the objects `ids`, else the selection (direct-selected anchors, else objects, else ruler guides)",
+            has_selection_or_guides,
+            clear
+        ),
         cmd!("edit.duplicate", "Duplicate", [], None, "{dx?, dy?} duplicate the selection in place (offset optional)", has_selection, duplicate),
     ]
 }
@@ -224,6 +232,10 @@ fn clear(s: &mut Session, p: &Value) -> Result<Value> {
     if ids_param(p, "ids").is_none() && !s.doc()?.selection.anchors.is_empty() {
         return super::path::delete_anchors(s, p);
     }
+    // Selected ruler guides (selected on their own).
+    if ids_param(p, "ids").is_none() && s.doc()?.selection.is_empty() {
+        return super::docmenu::guide_remove(s, &json!({}));
+    }
     let ids = match ids_param(p, "ids") {
         Some(v) => v,
         None => selected_roots(s)?,

crates/engine/src/cmd/mod.rs

@@ -144,6 +144,11 @@ pub fn has_selection(s: &Session) -> std::result::Result<(), String> {
     let st = s.active().ok_or("no document open")?;
     if st.selection.is_empty() { Err("nothing selected".into()) } else { Ok(()) }
 }
+/// Objects or ruler guides are selected (what Delete and the arrow keys act on).
+pub fn has_selection_or_guides(s: &Session) -> std::result::Result<(), String> {
+    let st = s.active().ok_or("no document open")?;
+    if st.selection.has_objects_or_guides() { Ok(()) } else { Err("nothing selected".into()) }
+}
 pub fn has_anchors(s: &Session) -> std::result::Result<(), String> {
     let st = s.active().ok_or("no document open")?;
     if st.selection.anchors.values().all(|a| a.is_empty()) { Err("no anchor points selected".into()) } else { Ok(()) }

crates/engine/src/cmd/object.rs

@@ -68,8 +68,8 @@ pub fn specs() -> Vec<CommandSpec> {
             "Nudge",
             [],
             None,
-            "{dx: -1|0|1, dy: -1|0|1, big?: bool (×10), copy?: bool} arrow-key nudge by the keyboard increment",
-            has_selection,
+            "{dx: -1|0|1, dy: -1|0|1, big?: bool (×10), copy?: bool} arrow-key nudge by the keyboard increment (the selected anchors, else objects, else ruler guides)",
+            has_selection_or_guides,
             nudge
         ),
         cmd!("object.arrange.bringToFront", "Bring to Front", ["Object", "Arrange"], Some("Cmd+Shift+]"), "{}", has_selection, |s, _| arrange(
@@ -268,6 +268,9 @@ fn nudge(s: &mut Session, p: &Value) -> Result<Value> {
     if !s.doc()?.selection.anchors.is_empty() {
         return super::path::move_anchors(s, &json!({ "dx": dx, "dy": dy }));
     }
+    if s.doc()?.selection.is_empty() {
+        return super::docmenu::guide_move(s, &json!({ "dx": dx, "dy": dy, "copy": bool_or(p, "copy", false) }));
+    }
     let ids = selected_roots(s)?;
     apply_transform(s, "Move", ids, Affine::translate((dx, dy)), p)
 }

crates/engine/src/lib.rs

@@ -293,7 +293,9 @@ fn strip_replay_only(id: &str, p: &mut Value) {
 /// have finite, in-range geometry, so saved files always reload and renderers never see NaN/∞.
 fn doc_sane(d: &Document, sel: &Selection) -> bool {
     let ok = |r: vectorcraft_geom::Rect| [r.x0, r.y0, r.x1, r.y1].iter().all(|v| v.is_finite() && v.abs() <= MAX_COORD);
-    d.artboards.iter().all(|a| ok(a.rect)) && sel.objects.iter().all(|id| d.node(*id).and_then(|n| n.geometric_bounds()).is_none_or(ok))
+    d.artboards.iter().all(|a| ok(a.rect))
+        && d.guides.iter().all(|g| g.pos.is_finite() && g.pos.abs() <= MAX_COORD)
+        && sel.objects.iter().all(|id| d.node(*id).and_then(|n| n.geometric_bounds()).is_none_or(ok))
 }
 
 /// Where new art goes (Illustrator's drawing modes, Shift+D cycles).

crates/engine/src/tests_menucmds.rs

@@ -740,6 +740,99 @@ fn ruler_guides_and_lock() {
     assert!(s.execute("guide.remove", &json!({"index": 0})).is_err());
 }
 
+fn guides(s: &Session) -> Vec<(bool, f64)> {
+    s.doc().unwrap().doc.guides.iter().map(|g| (g.vertical, g.pos)).collect()
+}
+
+fn selected_guides(s: &Session) -> Vec<usize> {
+    s.doc().unwrap().selection.guides.clone()
+}
+
+/// #414: ruler guides are selected, moved, copied, nudged and deleted like art, over commands.
+#[test]
+fn ruler_guides_select_move_and_delete() {
+    let mut s = session();
+    let a = rect(&mut s, 0.0, 0.0, 10.0, 10.0);
+    for (vertical, pos) in [(true, 100.0), (false, 50.0), (true, 300.0)] {
+        s.execute("guide.add", &json!({"vertical": vertical, "pos": pos})).unwrap();
+    }
+    sel(&mut s, &[a]);
+    // Selecting guides deselects the art; toggle adds and removes.
+    assert_eq!(s.execute("guide.select", &json!({"indexes": [0]})).unwrap()["selected"], json!([0]));
+    assert!(selected(&s).is_empty());
+    assert_eq!(s.execute("guide.select", &json!({"indexes": [1], "toggle": true})).unwrap()["selected"], json!([0, 1]));
+    assert_eq!(s.execute("guide.list", &json!({})).unwrap()[1], json!({"index": 1, "vertical": false, "pos": 50.0, "selected": true}));
+    assert!(s.execute("guide.select", &json!({"indexes": [7]})).is_err());
+    // A move takes each selected guide along its own axis, in one undo step.
+    let n = undo_len(&s);
+    s.execute("guide.move", &json!({"dx": 10, "dy": -5})).unwrap();
+    assert_eq!(guides(&s), [(true, 110.0), (false, 45.0), (true, 300.0)]);
+    assert_eq!(undo_len(&s), n + 1);
+    // Alt: copies, which are then the selection.
+    s.execute("guide.move", &json!({"dx": 20, "copy": true})).unwrap();
+    assert_eq!(guides(&s).len(), 5);
+    assert_eq!(&guides(&s)[3..], [(true, 130.0), (false, 45.0)]);
+    assert_eq!(selected_guides(&s), [3, 4]);
+    // The arrow keys nudge them.
+    s.execute("object.nudge", &json!({"dx": 1, "dy": 0, "big": true})).unwrap();
+    assert_eq!(guides(&s)[3], (true, 140.0));
+    // Delete (edit.clear) deletes the selected guides; the others keep their places.
+    s.execute("guide.select", &json!({"indexes": [1, 3]})).unwrap();
+    assert_eq!(s.execute("guide.list", &json!({})).unwrap().as_array().unwrap().len(), 5);
+    s.execute("edit.clear", &json!({})).unwrap();
+    assert_eq!(guides(&s), [(true, 110.0), (true, 300.0), (false, 45.0)]);
+    assert!(selected_guides(&s).is_empty());
+    assert!(s.doc().unwrap().doc.node(a).is_some(), "the art stays");
+    // Removing one keeps the rest of the selection pointing at the same guides.
+    s.execute("guide.select", &json!({"indexes": [1, 2]})).unwrap();
+    assert_eq!(s.execute("guide.remove", &json!({"index": 0})).unwrap()["count"], 1);
+    assert_eq!((guides(&s), selected_guides(&s)), (vec![(true, 300.0), (false, 45.0)], vec![0, 1]));
+    s.execute("edit.undo", &json!({})).unwrap();
+    assert_eq!((guides(&s).len(), selected_guides(&s)), (3, vec![1, 2]));
+    // Out of range positions are refused.
+    assert!(s.execute("guide.move", &json!({"index": 0, "pos": 1e300})).is_err());
+    assert!(s.execute("guide.add", &json!({"vertical": true, "pos": -1e300})).is_err());
+    // Locking deselects them, and they can't be picked again until unlocked.
+    s.execute("view.guides.lock", &json!({"locked": true})).unwrap();
+    assert!(selected_guides(&s).is_empty());
+    assert!(matches!(s.execute("guide.select", &json!({"indexes": [0]})), Err(EngineError::Disabled(..))));
+    assert!(matches!(s.execute("edit.clear", &json!({})), Err(EngineError::Disabled(..))));
+}
+
+/// #414: the Selection tool picks a ruler guide over the art and drags it in one undo step; with
+/// guides hidden or locked the press goes to the art.
+#[test]
+fn selection_tool_drags_a_ruler_guide() {
+    use vectorcraft_tools::{PointerEvent, PointerKind};
+    let mut s = session();
+    let a = rect(&mut s, 100.0, 100.0, 100.0, 100.0);
+    s.execute("guide.add", &json!({"vertical": true, "pos": 150})).unwrap();
+    s.execute("select.none", &json!({})).unwrap();
+    let v = ViewInfo { smart_guides: false, ..Default::default() };
+    s.select_tool("selection", v).unwrap();
+    let drag = |s: &mut Session, v: ViewInfo, from: (f64, f64), to: (f64, f64)| {
+        s.pointer(&PointerEvent::new(PointerKind::Down, from.0, from.1), v).unwrap();
+        s.pointer(&PointerEvent::new(PointerKind::Drag, to.0, to.1), v).unwrap();
+        s.pointer(&PointerEvent::new(PointerKind::Up, to.0, to.1), v).unwrap();
+    };
+    let n = undo_len(&s);
+    drag(&mut s, v, (151.0, 120.0), (171.0, 140.0));
+    assert_eq!(guides(&s), [(true, 170.0)]);
+    assert_eq!(selected_guides(&s), [0]);
+    assert!(selected(&s).is_empty());
+    assert_eq!(bounds(&s, a).x0, 100.0, "the art stays");
+    assert_eq!(undo_len(&s), n + 1);
+    assert_eq!(s.doc().unwrap().history.undo.last().unwrap().label, "Move Guide");
+    // Hidden guides: the press takes the art.
+    let hidden = ViewInfo { guides: false, ..v };
+    drag(&mut s, hidden, (170.0, 120.0), (180.0, 120.0));
+    assert_eq!((guides(&s), bounds(&s, a).x0), (vec![(true, 170.0)], 110.0));
+    // Locked guides too.
+    s.execute("view.guides.lock", &json!({"locked": true})).unwrap();
+    drag(&mut s, v, (170.0, 120.0), (180.0, 120.0));
+    assert_eq!((guides(&s), bounds(&s, a).x0), (vec![(true, 170.0)], 120.0));
+}
+
 // ---------- File ----------
 
 #[test]

crates/engine/src/tests_prefs.rs

@@ -152,3 +152,78 @@ fn gpu_preference_defaults_to_power_saving_and_validates() {
     s.execute("prefs.reset", &json!({"category": "Performance"})).unwrap();
     assert_eq!(s.prefs.gpu_preference, "powerSaving");
 }
+
+/// Selection & Anchor Display › Tolerance, Object Selection by Path Only and Command Click to
+/// Select Objects Behind, and General › Double Click To Isolate, as the Selection tool sees them
+/// (#394).
+#[test]
+fn selection_preferences_drive_the_selection_tool() {
+    use vectorcraft_tools::{Mods, PointerEvent, PointerKind};
+    let mut s = Session::new();
+    s.execute("file.new", &json!({"width": 400, "height": 400})).unwrap();
+    let rect = |s: &mut Session, x: f64| {
+        NodeId(s.execute("shape.rectangle", &json!({"x": x, "y": 100, "width": 100, "height": 100})).unwrap()["id"].as_u64().unwrap())
+    };
+    // Two filled squares overlapping between x = 150 and 200, `front` on top.
+    let (back, front) = (rect(&mut s, 100.0), rect(&mut s, 150.0));
+    s.select_tool("selection", ViewInfo::default()).unwrap();
+    let set = |s: &mut Session, key: &str, value: Value| s.execute("prefs.set", &json!({"key": key, "value": value})).unwrap();
+    let click = |s: &mut Session, x: f64, mods: Mods| {
+        for k in [PointerKind::Down, PointerKind::Up] {
+            // Halfway between the bounding box's handles.
+            s.pointer(&PointerEvent::new(k, x, 125.0).with_mods(mods), ViewInfo::default()).unwrap();
+        }
+        s.doc().unwrap().selection.objects.clone()
+    };
+    let plain = Mods::default();
+    // Tolerance: the right edge's stroke ends at x = 250.5.
+    assert_eq!(click(&mut s, 252.5, plain), vec![front], "2 px out: within the default 3 px");
+    assert!(click(&mut s, 256.5, plain).is_empty(), "6 px out: beyond 3 px");
+    set(&mut s, "selectionTolerance", json!(8));
+    assert_eq!(click(&mut s, 256.5, plain), vec![front], "6 px out: within 8 px");
+    set(&mut s, "selectionTolerance", json!(1));
+    assert!(click(&mut s, 252.5, plain).is_empty(), "2 px out: beyond 1 px");
+    set(&mut s, "selectionTolerance", json!(3));
+    // Object Selection by Path Only: the fill no longer selects, the path does.
+    assert_eq!(click(&mut s, 225.0, plain), vec![front]);
+    set(&mut s, "objectSelectionByPathOnly", json!(true));
+    assert!(click(&mut s, 225.0, plain).is_empty(), "a click inside the fill selects nothing");
+    assert_eq!(click(&mut s, 250.0, plain), vec![front], "a click on the path selects it");
+    set(&mut s, "objectSelectionByPathOnly", json!(false));
+    // Command Click to Select Objects Behind (on by default): each Cmd/Ctrl-click goes one down,
+    // then back to the top.
+    let cmd = Mods { cmd: true, ..Mods::default() };
+    assert_eq!(click(&mut s, 175.0, plain), vec![front]);
+    assert_eq!(click(&mut s, 175.0, cmd), vec![back], "the object behind");
+    assert_eq!(click(&mut s, 175.0, cmd), vec![front], "back to the topmost");
+    set(&mut s, "ctrlClickSelectsBehind", json!(false));
+    assert_eq!(click(&mut s, 175.0, cmd), vec![front], "off: a plain click");
+    // Double Click To Isolate (on by default) isolates a group; off, it doesn't.
+    s.execute("select.all", &json!({})).unwrap();
+    s.execute("object.group", &json!({})).unwrap();
+    let double = |s: &mut Session| {
+        s.pointer(&PointerEvent::new(PointerKind::DoubleClick, 175.0, 150.0), ViewInfo::default()).unwrap();
+        s.doc().unwrap().isolation
+    };
+    set(&mut s, "doubleClickToIsolate", json!(false));
+    assert_eq!(double(&mut s), None, "off: no isolation");
+    set(&mut s, "doubleClickToIsolate", json!(true));
+    assert!(double(&mut s).is_some(), "on: the group is isolated");
+}
+
+/// General › Use Precise Cursors (#394): the Pen's pointer becomes a crosshair; the Selection
+/// tool's arrow stays.
+#[test]
+fn use_precise_cursors_makes_drawing_cursors_crosshairs() {
+    use vectorcraft_tools::{Cursor, Mods};
+    let mut s = Session::new();
+    s.execute("file.new", &json!({"width": 400, "height": 400})).unwrap();
+    let cursor = |s: &mut Session, tool: &str| {
+        s.select_tool(tool, ViewInfo::default()).unwrap();
+        s.cursor(vectorcraft_geom::Point::new(300.0, 300.0), Mods::default(), ViewInfo::default())
+    };
+    assert_eq!(cursor(&mut s, "pen"), Cursor::Pen);
+    s.execute("prefs.set", &json!({"key": "usePreciseCursors", "value": true})).unwrap();
+    assert_eq!(cursor(&mut s, "pen"), Cursor::Crosshair);
+    assert_eq!(cursor(&mut s, "selection"), Cursor::Arrow);
+}

crates/engine/src/tooling.rs

@@ -13,6 +13,8 @@ pub struct ViewInfo {
     pub zoom: f64,
     pub outline: bool,
     pub smart_guides: bool,
+    /// View → Show Guides: the ruler guides show (and, unlocked, can be picked).
+    pub guides: bool,
     pub snap_to_grid: bool,
     pub show_bbox: bool,
     /// View → Snap to Pixel: drawing and moving land on whole pixels (points at 72 ppi).
@@ -31,6 +33,7 @@ impl Default for ViewInfo {
             zoom: 1.0,
             outline: false,
             smart_guides: true,
+            guides: true,
             snap_to_grid: false,
             show_bbox: true,
             snap_to_pixel: false,
@@ -134,6 +137,7 @@ impl Session {
             paint: &self.paint,
             outline: view.outline,
             smart_guides: view.smart_guides,
+            guides: view.guides && !self.menu.guides_locked,
             snap_to_grid: view.snap_to_grid,
             show_bbox: view.show_bbox,
             snap_to_pixel: view.snap_to_pixel,
@@ -152,6 +156,11 @@ impl Session {
             slices_hidden: self.menu.slices_hidden,
             slices_locked: self.menu.slices_locked,
             auto_add_delete: !self.prefs.disable_auto_add_delete,
+            selection_tolerance: self.prefs.selection_tolerance,
+            path_only: self.prefs.object_selection_by_path_only,
+            double_click_isolate: self.prefs.double_click_to_isolate,
+            select_behind: self.prefs.ctrl_click_selects_behind,
+            highlight_anchors: self.prefs.highlight_anchors_on_hover,
             screen: view.screen,
             plane_widget: self.prefs.perspective_widget.show.then_some(self.prefs.perspective_widget.position),
         };
@@ -265,8 +274,11 @@ impl Session {
         v
     }
 
+    /// The pointer the active tool shows at `p` (General › Use Precise Cursors makes the drawing
+    /// tools' a crosshair, [`Cursor::precise`]).
     pub fn cursor(&mut self, p: Point, mods: Mods, view: ViewInfo) -> Cursor {
-        self.with_tool_cx(view, |t, cx| t.cursor(cx, p, mods))
+        let c = self.with_tool_cx(view, |t, cx| t.cursor(cx, p, mods));
+        if self.prefs.use_precise_cursors { c.precise() } else { c }
     }
 
     pub fn tool_options(&self) -> Value {

crates/mcp/src/tests.rs

@@ -504,3 +504,28 @@ fn oversized_screenshot_and_png_export_are_errors() {
     let r = call(&mut s, 4, "screenshot", json!({"scale": 0.01}));
     assert_eq!(r["isError"], false, "{r}");
 }
+
+/// Preferences reach agents' gestures (#394): `prefs.set` Object Selection by Path Only, then a
+/// click inside a filled square selects nothing; Command Click to Select Objects Behind, a
+/// Cmd-click selects the square underneath.
+#[test]
+fn selection_preferences_apply_to_pointer_gestures() {
+    let mut s = server();
+    let square = |s: &mut Server, id: u64, x: u64| {
+        let r = call(s, id, "draw_shape", json!({"shape": "rectangle", "x": x, "y": 100, "width": 100, "height": 100, "fill": "#ff0000"}));
+        serde_json::from_str::<Value>(&text_of(&r)).unwrap()["id"].as_u64().unwrap()
+    };
+    let (back, front) = (square(&mut s, 1, 100), square(&mut s, 2, 150));
+    let click = |s: &mut Server, id: u64, x: f64, mods: Value| {
+        let events = json!([{"kind": "down", "x": x, "y": 125}, {"kind": "up", "x": x, "y": 125}]);
+        let r = call(s, id, "pointer_gesture", json!({"tool": "selection", "events": events, "mods": mods}));
+        assert_eq!(r["isError"], false, "{r}");
+        serde_json::from_str::<Value>(&text_of(&r)).unwrap()["selection"].clone()
+    };
+    assert_eq!(click(&mut s, 3, 175.0, json!({})), json!([front]));
+    assert_eq!(click(&mut s, 4, 175.0, json!({"cmd": true})), json!([back]), "Cmd-click selects behind");
+    let r = call(&mut s, 5, "run_command", json!({"command": "prefs.set", "params": {"key": "objectSelectionByPathOnly", "value": true}}));
+    assert_eq!(r["isError"], false, "{r}");
+    assert_eq!(click(&mut s, 6, 225.0, json!({})), json!([]), "path only: the fill doesn't select");
+    assert_eq!(click(&mut s, 7, 250.0, json!({})), json!([front]), "the path does");
+}

crates/text/src/layout.rs

@@ -281,7 +281,10 @@ fn is_japanese_letter(c: char) -> bool {
         return true;
     }
     is_cjk(c)
-        && !matches!(c as u32, 0x3000..=0x303F | 0xAC00..=0xD7AF | 0xFF01..=0xFF0F | 0xFF1A..=0xFF20 | 0xFF3B..=0xFF40 | 0xFF5B..=0xFF65)
+        && !matches!(
+            c as u32,
+            0x3000..=0x303F | 0x3130..=0x318F | 0xAC00..=0xD7AF | 0xFF01..=0xFF0F | 0xFF1A..=0xFF20 | 0xFF3B..=0xFF40 | 0xFF5B..=0xFF65 | 0xFFA0..=0xFFDC
+        )
         && c != '・'
         && punct(c).is_none()
 }
@@ -818,7 +821,8 @@ fn japanese_letters_for_the_latin_space_are_kana_kanji_and_marks_not_hangul_or_p
     for c in ['あ', 'カ', '漢', '々', '〆', '〇', 'Ａ'] {
         assert!(is_japanese_letter(c), "{c}");
     }
-    for c in ['한', '。', '「', '・', '、', 'a'] {
+    // Hangul in every form: syllables, compatibility jamo (ㄱ ㅏ), half-width jamo (ﾡ).
+    for c in ['한', 'ㄱ', 'ㅏ', '\u{FFA1}', '。', '「', '・', '、', 'a'] {
         assert!(!is_japanese_letter(c), "{c}");
     }
 }

crates/tools/src/direct.rs

@@ -7,11 +7,11 @@
 //! (the selected ones when anchors are selected; Alt-click cycles their kind, double-click opens
 //! the Corners dialog).
 //! Group Selection: click selects the leaf; each further click on it adds the next enclosing group.
-//! Both pick the key objects of a blend. Direct Selection also edits a blend's spine: drag its
-//! points (a key object on a point moves with it) and, once a point is clicked, its handles; and
-//! the points of selected gradient meshes and mesh envelopes and their handles ([`MeshEdit`]).
-//! Dragging a corner or an edge of area type's frame reshapes the type area (`text.reshapeArea`):
-//! the text reflows at its size.
+//! Both pick the key objects of a blend, and click or drag ruler guides ([`crate::rulerguide`]).
+//! Direct Selection also edits a blend's spine: drag its points (a key object on a point moves
+//! with it) and, once a point is clicked, its handles; and the points of selected gradient meshes
+//! and mesh envelopes and their handles ([`MeshEdit`]). Dragging a corner or an edge of area
+//! type's frame reshapes the type area (`text.reshapeArea`): the text reflows at its size.
 //!
 //! A press on the stroke of a path that isn't selected as a whole selects that segment's two anchors
 //! (the fill, or Alt, selects the whole path); dragging the segment bends it if it's curved, else
@@ -27,6 +27,7 @@ use vectorcraft_geom::{PathData, Point, Rect};
 use crate::bbox::move_delta;
 use crate::corners::{self, CornerDrag, over_widget};
 use crate::meshedit::MeshEdit;
+use crate::rulerguide::GuideEdit;
 use crate::select::{is_area_type, matrix_json};
 use crate::{Action, Cursor, Mods, Overlay, PointerEvent, PointerKind, Tool, ToolContext};
 
@@ -95,11 +96,14 @@ pub struct DirectSelectionTool {
     mesh: MeshEdit,
     /// Smart guides of the handle being dragged.
     guides: Vec<Overlay>,
+    /// The anchor under the pointer (Highlight anchors on mouse over): its path, where it is.
+    hover: Option<(NodeId, Point)>,
+    guide: GuideEdit,
 }
 
 impl DirectSelectionTool {
     pub fn new(group: bool) -> Self {
-        Self { group, state: State::Idle, spine: None, mesh: MeshEdit::default(), guides: vec![] }
+        Self { group, state: State::Idle, spine: None, mesh: MeshEdit::default(), guides: vec![], hover: None, guide: GuideEdit::default() }
     }
 }
 
@@ -232,13 +236,20 @@ impl Tool for DirectSelectionTool {
         if self.group { "groupSelection" } else { "directSelection" }
     }
     fn busy(&self) -> bool {
-        !matches!(self.state, State::Idle)
+        !matches!(self.state, State::Idle) || self.guide.busy()
     }
     fn pointer(&mut self, cx: &ToolContext, ev: &PointerEvent) -> Vec<Action> {
+        if let Some(out) = self.guide.pointer(cx, ev) {
+            return out;
+        }
         let p = ev.pos;
-        let tol = cx.tol(4.0);
+        let tol = cx.pick_tol();
         match (ev.kind, self.state.clone()) {
             (PointerKind::Down, _) if self.group => {
+                if let Some(out) = self.guide.press(cx, ev) {
+                    self.state = State::Idle;
+                    return out;
+                }
                 let Some(h) = hit_test(cx.doc, p, cx.hit_options()) else {
                     self.state = State::Marquee { start: p, cur: p, add: ev.mods.shift };
                     return vec![];
@@ -260,6 +271,10 @@ impl Tool for DirectSelectionTool {
                 }
             }
             (PointerKind::DoubleClick, _) if !self.group => corners::double_click(cx, p).into_iter().collect(),
+            (PointerKind::Move, State::Idle) => {
+                self.hover = if self.group || !cx.highlight_anchors { None } else { hovered_anchor(cx, p) };
+                vec![]
+            }
             (PointerKind::Down, _) => {
                 if let Some(c) = CornerDrag::hit(cx, ev) {
                     self.state = State::Corner(c);
@@ -303,6 +318,10 @@ impl Tool for DirectSelectionTool {
                 if let Some((id, anchors)) = hit_frame_edge(cx, p, tol) {
                     return self.press_type_area(cx, id, anchors, p, ev.mods.shift);
                 }
+                if let Some(out) = self.guide.press(cx, ev) {
+                    self.state = State::Idle;
+                    return out;
+                }
                 if let Some(h) = hit_test(cx.doc, p, cx.hit_options()) {
                     // A segment of a path that isn't selected as a whole: its two anchors get
                     // selected, and dragging it reshapes it if it's curved, else moves it. Alt picks
@@ -492,6 +511,10 @@ impl Tool for DirectSelectionTool {
                 if matches!(self.state, State::Handle { .. }) {
                     out.extend(self.guides.iter().cloned());
                 }
+                if let Some((id, p)) = self.hover.filter(|_| matches!(self.state, State::Idle)) {
+                    out.push(Overlay::Anchor { p, color: cx.doc.layer_color(id), filled: false, size: 8.0 });
+                }
+                out.extend(self.guide.overlays(cx));
                 out
             }
         }
@@ -500,10 +523,22 @@ impl Tool for DirectSelectionTool {
         if !self.group && (matches!(self.state, State::Corner(_)) || over_widget(cx, p)) {
             return Cursor::CornerRadius;
         }
-        Cursor::ArrowHollow
+        // A press on the highlighted anchor picks it, not the guide.
+        self.guide.cursor(cx, p).filter(|_| self.hover.is_none() || self.guide.busy()).unwrap_or(Cursor::ArrowHollow)
     }
 }
 
+/// The anchor within the selection tolerance of `p`, of a selected path or the path under `p`:
+/// what Highlight anchors on mouse over marks (a press there picks it).
+fn hovered_anchor(cx: &ToolContext, p: Point) -> Option<(NodeId, Point)> {
+    let under = hit_test(cx.doc, p, cx.hit_options()).map(|h| h.leaf);
+    let tol = cx.pick_tol();
+    cx.selection.objects.iter().copied().chain(under).find_map(|id| {
+        let path = cx.doc.node(id).and_then(editable_path)?;
+        path.anchors().find(|(_, _, a)| a.p.distance(p) <= tol).map(|(_, _, a)| (id, a.p))
+    })
+}
+
 /// The frame anchors of the selected area type, which Direct Selection drags.
 fn frame_overlays(cx: &ToolContext) -> Vec<Overlay> {
     let mut out = vec![];
@@ -550,6 +585,26 @@ mod tests {
     use crate::testutil::*;
     use vectorcraft_doc::Selection;
 
+    /// #414: a ruler guide is picked over the art, but an anchor on it is picked first.
+    #[test]
+    fn direct_and_group_selection_pick_ruler_guides() {
+        let (mut d, id) = doc_with_rect();
+        d.guides.push(vectorcraft_doc::Guide { vertical: true, pos: 100.0 });
+        let (s, p) = (Selection::default(), paint());
+        let c = cx(&d, &s, &p);
+        let down = |t: &mut DirectSelectionTool, y: f64| t.pointer(&c, &PointerEvent::new(PointerKind::Down, 100.0, y));
+        let pick = vec![Action::Exec("guide.select".into(), json!({"indexes": [0]}))];
+        for group in [false, true] {
+            let mut t = DirectSelectionTool::new(group);
+            assert_eq!(down(&mut t, 150.0), pick, "on the rect's edge (group: {group})");
+            assert!(t.busy());
+            t.pointer(&c, &PointerEvent::new(PointerKind::Up, 100.0, 150.0));
+            assert_eq!(t.cursor(&c, Point::new(101.0, 300.0), Mods::default()), Cursor::ResizeH);
+        }
+        let mut t = DirectSelectionTool::new(false);
+        assert_eq!(down(&mut t, 100.0), vec![Action::Exec("select.anchors".into(), json!({"id": id.0, "anchors": [[0, 0]], "mode": "set"}))]);
+    }
+
     /// A blend of two 20 pt squares centred on (110, 310) and (210, 310), selected.
     fn blend_doc() -> (vectorcraft_doc::Document, NodeId, NodeId) {
         let (mut d, _) = doc_with_rect();
@@ -564,6 +619,30 @@ mod tests {
         (d, g, k1)
     }
 
+    /// Highlight anchors on mouse over (#394): the anchor under the pointer, within the selection
+    /// tolerance, shows enlarged; none with the preference off or away from anchors.
+    #[test]
+    fn the_anchor_under_the_pointer_is_highlighted() {
+        let (d, id) = doc_with_rect();
+        let s = Selection::default();
+        let p = paint();
+        let big = |t: &DirectSelectionTool, cx: &ToolContext| {
+            t.overlays(cx).into_iter().find_map(|o| match o {
+                Overlay::Anchor { p, size, .. } if size > 5.0 => Some(p),
+                _ => None,
+            })
+        };
+        let mut t = DirectSelectionTool::new(false);
+        let on = cx(&d, &s, &p);
+        t.pointer(&on, &PointerEvent::new(PointerKind::Move, 102.0, 101.0));
+        assert_eq!(big(&t, &on), Some(Point::new(100.0, 100.0)), "the corner of {id:?}");
+        t.pointer(&on, &PointerEvent::new(PointerKind::Move, 150.0, 100.0));
+        assert_eq!(big(&t, &on), None, "mid-segment: no anchor");
+        let off = ToolContext { highlight_anchors: false, ..cx(&d, &s, &p) };
+        t.pointer(&off, &PointerEvent::new(PointerKind::Move, 102.0, 101.0));
+        assert_eq!(big(&t, &off), None, "off");
+    }
+
     #[test]
     fn dragging_a_spine_point_moves_it() {
         let (d, g, _) = blend_doc();

crates/tools/src/guides.rs

@@ -142,6 +142,23 @@ impl Targets {
         (out, ov)
     }
 
+    /// Snap a ruler guide at `v` (the x of a vertical one, the y of a horizontal one) into line
+    /// with the nearest edge, centre or anchor within `tol`: where it goes, and a label there.
+    pub fn snap_guide(&self, vertical: bool, v: f64, tol: f64) -> (f64, Vec<Overlay>) {
+        let along = |q: &Point| if vertical { q.x } else { q.y };
+        let lines = if vertical { &self.xs } else { &self.ys };
+        let best = lines
+            .iter()
+            .map(|(t, from, k)| (*t, *from, *k))
+            .chain(self.points.iter().map(|(q, k)| (along(q), *q, *k)))
+            .filter(|(t, ..)| (t - v).abs() <= tol)
+            .min_by(|a, b| (a.0 - v).abs().total_cmp(&(b.0 - v).abs()));
+        match best {
+            Some((t, from, k)) => (t, vec![Overlay::Label { p: from, text: k.label().into(), color: MAGENTA }]),
+            None => (v, vec![]),
+        }
+    }
+
     /// Snap a dragged point that carries others along at `offsets` (a resize handle and the
     /// bleed edge beyond it): onto an anchor or centre near the point itself, otherwise into line
     /// with targets, each axis on whichever of them comes nearest.
@@ -298,8 +315,7 @@ fn snap_with(cx: &ToolContext, p: Point, targets: impl FnOnce() -> Targets) -> (
         return (Point::new(p.x.round(), p.y.round()), vec![]);
     }
     if cx.snap_to_grid {
-        let s = cx.doc.grid.spacing / cx.doc.grid.subdivisions.max(1) as f64;
-        return (vectorcraft_geom::snap::snap_point_to_grid(p, s), vec![]);
+        return (vectorcraft_geom::snap::snap_point_to_grid(p, cx.grid_step()), vec![]);
     }
     if !cx.smart_guides {
         return (p, vec![]);

crates/tools/src/lib.rs

@@ -23,6 +23,7 @@ pub mod params;
 pub mod pen;
 pub mod place;
 pub mod printtiling;
+pub mod rulerguide;
 pub mod select;
 pub mod settings;
 pub mod shape;
@@ -201,6 +202,13 @@ impl ScreenFrame {
     pub fn at(&self, x: f64, y: f64) -> Point {
         self.origin + self.right * x + self.down * y
     }
+    /// Where the document point `p` is, in screen pixels from the window's top-left corner (the
+    /// inverse of [`Self::at`]); none for a degenerate frame.
+    pub fn to_screen(&self, p: Point) -> Option<(f64, f64)> {
+        let (r, d, v) = (self.right, self.down, p - self.origin);
+        let det = r.x * d.y - d.x * r.y;
+        (det.is_finite() && det.abs() > 1e-12).then(|| ((v.x * d.y - d.x * v.y) / det, (r.x * v.y - v.x * r.y) / det))
+    }
 }
 
 /// Read-only context a tool sees.
@@ -213,6 +221,8 @@ pub struct ToolContext<'a> {
     pub paint: &'a PaintDefaults,
     pub outline: bool,
     pub smart_guides: bool,
+    /// View → Show Guides with Lock Guides off: the selection tools pick and drag ruler guides.
+    pub guides: bool,
     pub snap_to_grid: bool,
     /// Bounding box shown (View → Show/Hide Bounding Box).
     pub show_bbox: bool,
@@ -253,6 +263,22 @@ pub struct ToolContext<'a> {
     /// General → Disable Auto Add/Delete is off: the Pen adds an anchor on a selected path's
     /// segment and deletes one of its anchors.
     pub auto_add_delete: bool,
+    /// Selection & Anchor Display → Tolerance: how near (screen pixels) a click must be to a path
+    /// or an anchor to pick it.
+    pub selection_tolerance: f64,
+    /// Selection & Anchor Display → Object Selection by Path Only: a click inside a filled path
+    /// doesn't pick it, only one on its path does.
+    pub path_only: bool,
+    /// General → Double Click To Isolate: a double-click on a group with the Selection tool
+    /// isolates it.
+    pub double_click_isolate: bool,
+    /// Selection & Anchor Display → Command Click to Select Objects Behind: Cmd/Ctrl-click with the
+    /// Selection tool selects the object under the selected one, the next click the one under
+    /// that.
+    pub select_behind: bool,
+    /// Selection & Anchor Display → Highlight anchors on mouse over: Direct Selection marks the
+    /// anchor under the pointer.
+    pub highlight_anchors: bool,
     /// The document window (none headless): screen-fixed widgets sit in it.
     pub screen: Option<ScreenFrame>,
     /// Where the Plane Switching Widget sits (Perspective Grid Options); None while it's hidden.
@@ -276,8 +302,16 @@ impl ToolContext<'_> {
     pub fn offset_label(&self, dx: f64, dy: f64) -> String {
         format!("dX: {}\ndY: {}", self.len(dx), self.len(dy))
     }
+    /// What Snap to Grid snaps to: the grid's subdivisions (or its lines without any).
+    pub fn grid_step(&self) -> f64 {
+        self.doc.grid.spacing / self.doc.grid.subdivisions.max(1) as f64
+    }
+    /// The selection tolerance in document units ([`Self::selection_tolerance`]).
+    pub fn pick_tol(&self) -> f64 {
+        self.tol(self.selection_tolerance)
+    }
     pub fn hit_options(&self) -> vectorcraft_doc::hit::HitOptions {
-        vectorcraft_doc::hit::HitOptions { tol: self.tol(3.0), outline: self.outline, path_only: false }
+        vectorcraft_doc::hit::HitOptions { tol: self.pick_tol(), outline: self.outline, path_only: self.path_only }
     }
 }
 
@@ -356,6 +390,27 @@ pub enum Cursor {
     BlendAnchor,
 }
 
+impl Cursor {
+    /// General › Use Precise Cursors: the drawing tools' pointers (the Pen's in every state, the
+    /// Eyedropper's, the Slice and Blend tools') become a plain crosshair at the hotspot.
+    pub fn precise(self) -> Self {
+        match self {
+            Cursor::Pen
+            | Cursor::PenAdd
+            | Cursor::PenDelete
+            | Cursor::PenClose
+            | Cursor::PenContinue
+            | Cursor::PenConvert
+            | Cursor::Eyedropper
+            | Cursor::Slice
+            | Cursor::Blend
+            | Cursor::BlendObject
+            | Cursor::BlendAnchor => Cursor::Crosshair,
+            c => c,
+        }
+    }
+}
+
 /// A tool state machine.
 pub trait Tool: Send {
     fn id(&self) -> &'static str;
@@ -506,6 +561,7 @@ pub(crate) mod testutil {
             paint: p,
             outline: false,
             smart_guides: true,
+            guides: true,
             snap_to_grid: false,
             show_bbox: true,
             snap_to_pixel: false,
@@ -524,6 +580,11 @@ pub(crate) mod testutil {
             slices_hidden: false,
             slices_locked: false,
             auto_add_delete: true,
+            selection_tolerance: 3.0,
+            path_only: false,
+            double_click_isolate: true,
+            select_behind: true,
+            highlight_anchors: true,
             screen: None,
             plane_widget: Some(Default::default()),
         }

crates/tools/src/rulerguide.rs

@@ -0,0 +1,314 @@
+//! Ruler guides on the canvas, for the selection tools. A press on a guide selects it (Shift adds
+//! it to the selected guides or, released without a drag, takes it out); dragging moves the
+//! selected guides (Alt copies them). The dragged guide snaps: with Shift to the ruler's ticks,
+//! else as a drawn point does (whole pixels, the grid, or with Smart Guides the art's edges,
+//! centres and anchors). Dropped off the canvas onto its ruler, the guide is deleted. Hidden or
+//! locked guides (View › Guides) can't be picked.
+
+use serde_json::json;
+use vectorcraft_geom::Point;
+
+use crate::guides::Targets;
+use crate::{Action, Cursor, Overlay, PointerEvent, PointerKind, ToolContext};
+
+/// The ruler guide under `p`: the nearest within the selection tolerance (the newest of equals).
+pub fn guide_at(cx: &ToolContext, p: Point) -> Option<usize> {
+    if !cx.guides {
+        return None;
+    }
+    let tol = cx.pick_tol();
+    let off = |pos: f64, vertical: bool| (if vertical { p.x } else { p.y } - pos).abs();
+    cx.doc
+        .guides
+        .iter()
+        .enumerate()
+        .map(|(i, g)| (i, off(g.pos, g.vertical)))
+        .filter(|(_, d)| *d <= tol)
+        .min_by(|a, b| a.1.total_cmp(&b.1).then(b.0.cmp(&a.0)))
+        .map(|(i, _)| i)
+}
+
+/// The pointer for a guide: it moves sideways if vertical, up and down if horizontal.
+fn guide_cursor(vertical: bool) -> Cursor {
+    if vertical { Cursor::ResizeH } else { Cursor::ResizeV }
+}
+
+#[derive(Clone, Copy, Debug)]
+struct Drag {
+    index: usize,
+    vertical: bool,
+    /// Where the guide was, and where it is now (x of a vertical guide, y of a horizontal one).
+    from: f64,
+    at: f64,
+    start: Point,
+    pointer: Point,
+    began: bool,
+    /// Shift-pressed on a selected guide: released without a drag, it leaves the selection.
+    deselect: bool,
+}
+
+/// A selection tool's ruler-guide handling: [`Self::press`] on a press, [`Self::pointer`] for
+/// the rest of the gesture.
+#[derive(Default)]
+pub struct GuideEdit {
+    drag: Option<Drag>,
+    /// Smart Guides targets, gathered when the drag starts.
+    targets: Option<Targets>,
+    /// The smart guide the dragged guide snapped to.
+    snapped: Vec<Overlay>,
+}
+
+impl GuideEdit {
+    /// Is a guide pressed or being dragged?
+    pub fn busy(&self) -> bool {
+        self.drag.is_some()
+    }
+
+    /// A press `ev` on a ruler guide: it gets selected and the drag starts. None (and nothing
+    /// done) when no guide is there.
+    pub fn press(&mut self, cx: &ToolContext, ev: &PointerEvent) -> Option<Vec<Action>> {
+        let index = guide_at(cx, ev.pos)?;
+        let g = cx.doc.guides.get(index)?;
+        let (shift, selected) = (ev.mods.shift, cx.selection.guides.contains(&index));
+        self.drag = Some(Drag {
+            index,
+            vertical: g.vertical,
+            from: g.pos,
+            at: g.pos,
+            start: ev.pos,
+            pointer: ev.pos,
+            began: false,
+            deselect: shift && selected,
+        });
+        self.targets = None;
+        self.snapped.clear();
+        Some(match (selected, shift) {
+            (true, _) => vec![],
+            (false, true) => vec![Action::Exec("guide.select".into(), json!({ "indexes": [index], "toggle": true }))],
+            (false, false) => vec![Action::Exec("guide.select".into(), json!({ "indexes": [index] }))],
+        })
+    }
+
+    /// The drag and release of a guide [`Self::press`] picked; None when no guide is pressed.
+    pub fn pointer(&mut self, cx: &ToolContext, ev: &PointerEvent) -> Option<Vec<Action>> {
+        let mut d = self.drag?;
+        Some(match ev.kind {
+            PointerKind::Drag => {
+                let out = self.drag_to(cx, &mut d, ev);
+                self.drag = Some(d);
+                out
+            }
+            PointerKind::Up => {
+                self.drag = None;
+                self.targets = None;
+                self.snapped.clear();
+                if d.began && on_ruler(cx, d.vertical, ev.pos) {
+                    // Dropped on its ruler: the guide goes (a copy is just not made).
+                    let mut out = vec![Action::Cancel];
+                    if !ev.mods.alt {
+                        out.push(Action::Exec("guide.remove".into(), json!({ "index": d.index })));
+                    }
+                    out
+                } else if d.began {
+                    vec![Action::Commit]
+                } else if d.deselect {
+                    vec![Action::Exec("guide.select".into(), json!({ "indexes": [d.index], "toggle": true }))]
+                } else {
+                    vec![]
+                }
+            }
+            // Another press ends the gesture.
+            _ => {
+                self.drag = None;
+                return None;
+            }
+        })
+    }
+
+    fn drag_to(&mut self, cx: &ToolContext, d: &mut Drag, ev: &PointerEvent) -> Vec<Action> {
+        let p = ev.pos;
+        let mut out = vec![];
+        if !d.began {
+            if p.distance(d.start) < cx.tol(3.0) {
+                return out;
+            }
+            d.began = true;
+            out.push(Action::Begin(if ev.mods.alt { "Copy Guide" } else { "Move Guide" }.into()));
+            self.targets = cx.smart_guides.then(|| Targets::collect(cx.doc, &[], None));
+        }
+        let moved = p - d.start;
+        let (at, snapped) = self.snap(cx, d.vertical, d.from + if d.vertical { moved.x } else { moved.y }, ev.mods.shift);
+        (d.at, d.pointer, self.snapped) = (at, p, snapped);
+        // The other selected guides follow the pointer: vertical ones across, horizontal ones down.
+        let (dx, dy) = if d.vertical { (at - d.from, moved.y) } else { (moved.x, at - d.from) };
+        out.push(Action::Preview("guide.move".into(), json!({ "dx": dx, "dy": dy, "copy": ev.mods.alt })));
+        out
+    }
+
+    /// Where a guide dragged to `v` goes: with Shift on the nearest ruler tick, else on whole
+    /// pixels, the grid or a smart guide (as a drawn point snaps).
+    fn snap(&self, cx: &ToolContext, vertical: bool, v: f64, shift: bool) -> (f64, Vec<Overlay>) {
+        if shift {
+            return (cx.unit.snap_to_ruler_tick(v, cx.zoom), vec![]);
+        }
+        if cx.snap_to_pixel {
+            return (v.round(), vec![]);
+        }
+        if cx.snap_to_grid {
+            return (vectorcraft_geom::snap::snap_to_grid(v, cx.grid_step(), 0.0), vec![]);
+        }
+        match &self.targets {
+            Some(t) => t.snap_guide(vertical, v, cx.tol(5.0)),
+            None => (v, vec![]),
+        }
+    }
+
+    /// The pointer over a guide, or while one is dragged.
+    pub fn cursor(&self, cx: &ToolContext, p: Point) -> Option<Cursor> {
+        if let Some(d) = &self.drag {
+            return Some(guide_cursor(d.vertical));
+        }
+        guide_at(cx, p).and_then(|i| cx.doc.guides.get(i)).map(|g| guide_cursor(g.vertical))
+    }
+
+    /// While a guide is dragged: the smart guide it snapped to and its position by the pointer.
+    pub fn overlays(&self, cx: &ToolContext) -> Vec<Overlay> {
+        let Some(d) = self.drag.filter(|d| d.began) else { return vec![] };
+        let mut o = self.snapped.clone();
+        let axis = if d.vertical { "X" } else { "Y" };
+        o.push(Overlay::Measure { p: d.pointer, text: format!("{axis}: {}", cx.len(d.at)) });
+        o
+    }
+}
+
+/// Is `p` off the canvas on the side of the ruler a guide comes from (the top one for a
+/// horizontal guide, the left one for a vertical guide)? Never without a window.
+fn on_ruler(cx: &ToolContext, vertical: bool, p: Point) -> bool {
+    cx.screen.and_then(|s| s.to_screen(p)).is_some_and(|(x, y)| if vertical { x < 0.0 } else { y < 0.0 })
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::testutil::*;
+    use crate::{Mods, ScreenFrame};
+    use vectorcraft_doc::{Guide, Selection};
+    use vectorcraft_geom::Vec2;
+
+    fn ev(kind: PointerKind, x: f64, y: f64, mods: Mods) -> PointerEvent {
+        PointerEvent::new(kind, x, y).with_mods(mods)
+    }
+
+    fn guides_doc() -> vectorcraft_doc::Document {
+        let (mut d, _) = doc_with_rect();
+        d.guides = vec![Guide { vertical: true, pos: 300.0 }, Guide { vertical: false, pos: 400.0 }];
+        d
+    }
+
+    #[test]
+    fn picks_the_guide_within_the_tolerance_unless_hidden_or_locked() {
+        let (d, s, p) = (guides_doc(), Selection::default(), paint());
+        let c = cx(&d, &s, &p);
+        assert_eq!(guide_at(&c, Point::new(302.0, 50.0)), Some(0));
+        assert_eq!(guide_at(&c, Point::new(50.0, 398.0)), Some(1));
+        // Where they cross, the nearer one.
+        assert_eq!(guide_at(&c, Point::new(301.0, 398.0)), Some(0));
+        assert_eq!(guide_at(&c, Point::new(305.0, 50.0)), None, "beyond the 3 px tolerance");
+        let hidden = ToolContext { guides: false, ..cx(&d, &s, &p) };
+        assert_eq!(guide_at(&hidden, Point::new(300.0, 50.0)), None);
+    }
+
+    #[test]
+    fn a_drag_moves_the_selected_guides_in_one_step() {
+        let d = guides_doc();
+        let (s, p) = (Selection::default(), paint());
+        let c = cx(&d, &s, &p);
+        let mut g = GuideEdit::default();
+        let m = Mods::default();
+        assert_eq!(g.press(&c, &ev(PointerKind::Down, 300.0, 50.0, m)), Some(vec![Action::Exec("guide.select".into(), json!({"indexes": [0]}))]));
+        // The tool sees the guide selected from now on.
+        let mut s = s;
+        s.set_guides([0]);
+        let c = cx(&d, &s, &p);
+        let a = g.pointer(&c, &ev(PointerKind::Drag, 340.0, 60.0, m)).unwrap();
+        assert_eq!(a[0], Action::Begin("Move Guide".into()));
+        assert_eq!(a[1], Action::Preview("guide.move".into(), json!({"dx": 40.0, "dy": 10.0, "copy": false})));
+        assert!(matches!(g.overlays(&c).last(), Some(Overlay::Measure { text, .. }) if text == "X: 340.00 pt"));
+        assert_eq!(g.cursor(&c, Point::ZERO), Some(Cursor::ResizeH));
+        assert_eq!(g.pointer(&c, &ev(PointerKind::Up, 340.0, 60.0, m)), Some(vec![Action::Commit]));
+        assert!(!g.busy() && g.pointer(&c, &ev(PointerKind::Drag, 0.0, 0.0, m)).is_none());
+    }
+
+    #[test]
+    fn the_dragged_guide_snaps_to_art_ruler_ticks_and_the_grid() {
+        let d = guides_doc();
+        let mut s = Selection::default();
+        s.set_guides([0]);
+        let p = paint();
+        let drag_to = |c: &ToolContext, x: f64, mods: Mods| {
+            let mut g = GuideEdit::default();
+            g.press(c, &ev(PointerKind::Down, 300.0, 50.0, Mods::default()));
+            let a = g.pointer(c, &ev(PointerKind::Drag, x, 50.0, mods)).unwrap();
+            let Some(Action::Preview(_, v)) = a.last() else { panic!("{a:?}") };
+            (300.0 + v["dx"].as_f64().unwrap(), g.overlays(c))
+        };
+        // Smart Guides: onto the rect's right edge (x = 200), labelled.
+        let (x, ov) = drag_to(&cx(&d, &s, &p), 203.0, Mods::default());
+        assert_eq!(x, 200.0);
+        assert!(matches!(&ov[0], Overlay::Label { .. }));
+        let off = ToolContext { smart_guides: false, ..cx(&d, &s, &p) };
+        assert_eq!(drag_to(&off, 203.0, Mods::default()).0, 203.0);
+        // Shift: the ruler's ticks (labels every 50 pt at 100 %, ticks every 5 pt).
+        assert_eq!(drag_to(&off, 223.0, Mods { shift: true, ..Default::default() }).0, 225.0);
+        let zoomed = ToolContext { zoom: 5.0, ..cx(&d, &s, &p) };
+        assert_eq!(drag_to(&zoomed, 223.4, Mods { shift: true, ..Default::default() }).0, 223.0, "every point at 500 %");
+        let grid = ToolContext { snap_to_grid: true, ..cx(&d, &s, &p) };
+        assert_eq!(drag_to(&grid, 226.0, Mods::default()).0, 225.0, "the grid's 9 pt subdivisions");
+    }
+
+    #[test]
+    fn shift_click_toggles_and_alt_drag_copies() {
+        let d = guides_doc();
+        let mut s = Selection::default();
+        s.set_guides([0, 1]);
+        let p = paint();
+        let c = cx(&d, &s, &p);
+        let (shift, alt) = (Mods { shift: true, ..Default::default() }, Mods { alt: true, ..Default::default() });
+        let mut g = GuideEdit::default();
+        assert_eq!(g.press(&c, &ev(PointerKind::Down, 50.0, 400.0, shift)), Some(vec![]));
+        let deselect = Action::Exec("guide.select".into(), json!({"indexes": [1], "toggle": true}));
+        assert_eq!(g.pointer(&c, &ev(PointerKind::Up, 50.0, 400.0, shift)), Some(vec![deselect]));
+        g.press(&c, &ev(PointerKind::Down, 50.0, 400.0, alt));
+        let a = g.pointer(&c, &ev(PointerKind::Drag, 50.0, 420.0, alt)).unwrap();
+        assert_eq!(a[0], Action::Begin("Copy Guide".into()));
+        assert_eq!(a[1], Action::Preview("guide.move".into(), json!({"dx": 0.0, "dy": 20.0, "copy": true})));
+    }
+
+    #[test]
+    fn dropped_on_its_ruler_the_guide_is_deleted() {
+        let d = guides_doc();
+        let p = paint();
+        let mut s = Selection::default();
+        s.set_guides([1]);
+        // The window shows the document from (0, 0) at 100 %: above y = 0 is the top ruler.
+        let screen = ScreenFrame { origin: Point::ZERO, right: Vec2::new(1.0, 0.0), down: Vec2::new(0.0, 1.0), size: (800.0, 600.0) };
+        let c = ToolContext { screen: Some(screen), ..cx(&d, &s, &p) };
+        let m = Mods::default();
+        let gesture = |to: Point, mods: Mods| {
+            let mut g = GuideEdit::default();
+            g.press(&c, &ev(PointerKind::Down, 50.0, 400.0, m));
+            g.pointer(&c, &ev(PointerKind::Drag, to.x, to.y, mods));
+            g.pointer(&c, &ev(PointerKind::Up, to.x, to.y, mods)).unwrap()
+        };
+        assert_eq!(gesture(Point::new(50.0, -6.0), m), vec![Action::Cancel, Action::Exec("guide.remove".into(), json!({"index": 1}))]);
+        assert_eq!(gesture(Point::new(50.0, -6.0), Mods { alt: true, ..m }), vec![Action::Cancel], "a copy is just not made");
+        // Off the left side: not its ruler.
+        assert_eq!(gesture(Point::new(-6.0, 300.0), m), vec![Action::Commit]);
+        // Headless (no window): no ruler to drop it on.
+        let mut g = GuideEdit::default();
+        let c = cx(&d, &s, &p);
+        g.press(&c, &ev(PointerKind::Down, 50.0, 400.0, m));
+        g.pointer(&c, &ev(PointerKind::Drag, 50.0, -6.0, m));
+        assert_eq!(g.pointer(&c, &ev(PointerKind::Up, 50.0, -6.0, m)), Some(vec![Action::Commit]));
+    }
+}

crates/tools/src/select.rs

@@ -1,18 +1,21 @@
 //! The Selection tool (V): click/shift-click, marquee, move (Alt copies, Shift constrains),
 //! bounding-box scale (Shift proportional, Alt from centre) and rotate (outside corners, Shift 45°),
 //! drag a live rectangle's corner widget to round its corners (Alt-click cycles their kind,
-//! double-click opens the Corners dialog), double-click to enter isolation mode.
+//! double-click opens the Corners dialog), double-click to enter isolation mode (Double Click To
+//! Isolate), Cmd/Ctrl-click to select the object behind (Command Click to Select Objects Behind),
+//! click or drag a ruler guide ([`crate::rulerguide`]).
 //! The bounding box stands at the selection's own angle after a rotation, so its handles scale
 //! along the objects' axes. A handle drag resizes area type's frame (the type area) instead of
 //! scaling its type: the text reflows at its size.
 
 use serde_json::{Value, json};
-use vectorcraft_doc::hit::{hit_test, marquee};
+use vectorcraft_doc::hit::{hit_test, marquee, objects_at};
 use vectorcraft_doc::{NodeId, OrientedBox};
 use vectorcraft_geom::{Affine, Point, Rect};
 
 use crate::bbox::{Handle, hit_handle, in_rotate_zone, move_delta, rotate_for_drag, scale_for_drag};
 use crate::corners::{self, CornerDrag, over_widget};
+use crate::rulerguide::GuideEdit;
 use crate::{Action, Cursor, Mods, Overlay, PointerEvent, PointerKind, Tool, ToolContext, json_ids};
 
 #[derive(Clone, Debug, Default)]
@@ -53,6 +56,7 @@ pub struct SelectionTool {
     guides: Vec<Overlay>,
     targets: Option<crate::guides::Targets>,
     start_bounds: Option<Rect>,
+    guide: GuideEdit,
 }
 
 pub fn matrix_json(a: Affine) -> Value {
@@ -100,10 +104,13 @@ impl Tool for SelectionTool {
     }
 
     fn busy(&self) -> bool {
-        !matches!(self.state, State::Idle)
+        !matches!(self.state, State::Idle) || self.guide.busy()
     }
 
     fn pointer(&mut self, cx: &ToolContext, ev: &PointerEvent) -> Vec<Action> {
+        if let Some(out) = self.guide.pointer(cx, ev) {
+            return out;
+        }
         let p = ev.pos;
         let m = ev.mods;
         match (ev.kind, self.state.clone()) {
@@ -112,9 +119,12 @@ impl Tool for SelectionTool {
                 if let Some(a) = corners::double_click(cx, p) {
                     return vec![a];
                 }
+                if crate::rulerguide::guide_at(cx, p).is_some() {
+                    return vec![];
+                }
                 if let Some(h) = hit_test(cx.doc, p, cx.hit_options()) {
                     let top = h.top_object(cx.isolation);
-                    if cx.doc.node(top).is_some_and(|n| matches!(n.kind, vectorcraft_doc::NodeKind::Group { .. })) {
+                    if cx.double_click_isolate && cx.doc.node(top).is_some_and(|n| matches!(n.kind, vectorcraft_doc::NodeKind::Group { .. })) {
                         return vec![Action::Exec("object.isolate".into(), json!({ "id": top.0 }))];
                     }
                     if cx.doc.node(top).is_some_and(|n| matches!(n.kind, vectorcraft_doc::NodeKind::Text(_))) {
@@ -152,7 +162,19 @@ impl Tool for SelectionTool {
                         None => {}
                     }
                 }
-                // 2. Objects.
+                // 2. Ruler guides (over the art, as they are drawn).
+                if let Some(out) = self.guide.press(cx, ev) {
+                    self.state = State::Idle;
+                    return out;
+                }
+                // 3. Objects: Cmd/Ctrl-click selects the one under the selected one (cycling).
+                if m.cmd
+                    && cx.select_behind
+                    && let Some(behind) = object_behind(cx, p)
+                {
+                    self.state = State::Moving { start: p, began: false, deselect: None };
+                    return vec![Action::Exec("select.set".into(), json!({ "ids": [behind.0] }))];
+                }
                 match hit_test(cx.doc, p, cx.hit_options()) {
                     Some(h) => {
                         let top = h.top_object(cx.isolation);
@@ -285,6 +307,7 @@ impl Tool for SelectionTool {
             _ => {}
         }
         o.extend(self.guides.iter().cloned());
+        o.extend(self.guide.overlays(cx));
         if let Some((p, t)) = &self.measure {
             o.push(Overlay::Measure { p: *p, text: t.clone() });
         }
@@ -299,6 +322,9 @@ impl Tool for SelectionTool {
             State::Corner(_) => return Cursor::CornerRadius,
             _ => {}
         }
+        if self.guide.busy() {
+            return self.guide.cursor(cx, p).unwrap_or_default();
+        }
         if over_widget(cx, p) {
             return Cursor::CornerRadius;
         }
@@ -311,6 +337,9 @@ impl Tool for SelectionTool {
                 None => {}
             }
         }
+        if let Some(c) = self.guide.cursor(cx, p) {
+            return c;
+        }
         if let Some(h) = hit_test(cx.doc, p, cx.hit_options()) {
             if cx.selection.contains(h.top_object(cx.isolation)) || m.alt {
                 return Cursor::Move;
@@ -321,6 +350,14 @@ impl Tool for SelectionTool {
     }
 }
 
+/// Select Behind: of the objects under `p` (topmost first), the one below the lowest selected
+/// one, back to the topmost after the bottom one; the topmost when none is selected.
+fn object_behind(cx: &ToolContext, p: Point) -> Option<NodeId> {
+    let stack = objects_at(cx.doc, p, cx.hit_options(), cx.isolation);
+    let next = stack.iter().rposition(|id| cx.selection.contains(*id)).map_or(0, |i| i + 1);
+    stack.get(next).or(stack.first()).copied()
+}
+
 /// Is `n` area type (text in a frame) whose frame the tools reshape? Type in perspective isn't:
 /// it transforms whole.
 pub(crate) fn is_area_type(n: &vectorcraft_doc::Node) -> bool {
@@ -362,6 +399,27 @@ mod tests {
         assert!(t.pointer(&cx, &ev(PointerKind::Up, 150.0, 150.0)).is_empty());
     }
 
+    /// #414: a press on a ruler guide picks it over the art, and drags it.
+    #[test]
+    fn a_press_on_a_ruler_guide_picks_it_over_the_art() {
+        let (mut d, _) = doc_with_rect();
+        d.guides.push(vectorcraft_doc::Guide { vertical: false, pos: 150.0 });
+        let s = Selection::default();
+        let p = paint();
+        let cx = cx(&d, &s, &p);
+        let mut t = SelectionTool::default();
+        assert_eq!(t.cursor(&cx, Point::new(160.0, 151.0), Mods::default()), Cursor::ResizeV);
+        let a = t.pointer(&cx, &ev(PointerKind::Down, 160.0, 151.0));
+        assert_eq!(a, vec![Action::Exec("guide.select".into(), json!({"indexes": [0]}))]);
+        assert!(t.busy());
+        let a = t.pointer(&cx, &ev(PointerKind::Drag, 160.0, 171.0));
+        assert_eq!(a[1], Action::Preview("guide.move".into(), json!({"dx": 0.0, "dy": 20.0, "copy": false})));
+        assert_eq!(t.pointer(&cx, &ev(PointerKind::Up, 160.0, 171.0)), vec![Action::Commit]);
+        assert!(!t.busy());
+        // A double-click there doesn't go through to the art.
+        assert!(t.pointer(&cx, &ev(PointerKind::DoubleClick, 160.0, 150.0)).is_empty());
+    }
+
     #[test]
     fn drag_moves_with_single_undo() {
         let (d, id) = doc_with_rect();

crates/tools/src/xform/artboard.rs

@@ -96,7 +96,7 @@ impl ArtboardTool {
             return Point::new(p.x.round(), p.y.round());
         }
         if cx.snap_to_grid {
-            return vectorcraft_geom::snap::snap_point_to_grid(p, grid_step(cx));
+            return vectorcraft_geom::snap::snap_point_to_grid(p, cx.grid_step());
         }
         let Some(t) = &self.targets else { return p };
         let offsets: &[Vec2] = if bleed == Vec2::ZERO { &[] } else { &[bleed] };
@@ -114,7 +114,7 @@ impl ArtboardTool {
             return Vec2::new((tl.x + d.x).round() - tl.x, (tl.y + d.y).round() - tl.y);
         }
         if cx.snap_to_grid {
-            return vectorcraft_geom::snap::snap_point_to_grid(tl + d, grid_step(cx)) - tl;
+            return vectorcraft_geom::snap::snap_point_to_grid(tl + d, cx.grid_step()) - tl;
         }
         let Some(t) = (if copy { &self.copy_targets } else { &self.targets }) else { return d };
         let moved = rect + d;
@@ -144,10 +144,6 @@ fn bleed_offset(cx: &ToolContext, rect: Rect, handle: Handle) -> Vec2 {
 }
 
 /// The grid's snapping step (gridline spacing over subdivisions), as `guides::snap_draw` uses.
-fn grid_step(cx: &ToolContext) -> f64 {
-    cx.doc.grid.spacing / cx.doc.grid.subdivisions.max(1) as f64
-}
-
 impl Tool for ArtboardTool {
     fn id(&self) -> &'static str {
         "artboard"

crates/ui-egui/Cargo.toml

@@ -33,3 +33,7 @@ log = { workspace = true }
 [dev-dependencies]
 vectorcraft-testkit = { workspace = true }
 wat = { workspace = true }
+
+[build-dependencies]
+serde_json = { workspace = true }
+toml = "1"

crates/ui-egui/build.rs

@@ -0,0 +1,105 @@
+//! Bake the contributor credits into the binary as static Rust tables (craftrules
+//! standards/contributors.md). Nothing is read at run time.
+//!
+//! - contributors/contributors.json: commit stats per GitHub username, generated by craftrules
+//!   scripts/contributors.py, which also marks whose people.toml entry it verified.
+//! - contributors/people.toml: the names people chose for themselves. A name is used only when the
+//!   JSON says the entry was verified (`people_entry`).
+//!
+//! A missing or malformed file gives empty tables (or no names) and a warning.
+
+use std::fmt::Write as _;
+
+use serde_json::Value;
+
+fn main() {
+    let dir = std::path::Path::new(env!("CARGO_MANIFEST_DIR")).join("../../contributors");
+    let json = read(&dir.join("contributors.json"), "the About window shows no contributors", |t| {
+        serde_json::from_str::<Value>(t).map_err(|e| e.to_string())
+    })
+    .unwrap_or(Value::Null);
+    let people = read(&dir.join("people.toml"), "contributors are shown by username only", |t| t.parse::<toml::Table>().map_err(|e| e.to_string()))
+        .unwrap_or_default();
+    let out = std::path::PathBuf::from(std::env::var_os("OUT_DIR").unwrap_or_default()).join("credits.rs");
+    if let Err(e) = std::fs::write(&out, generate(&json, &people)) {
+        println!("cargo::warning=writing {}: {e}", out.display());
+    }
+}
+
+fn read<T>(path: &std::path::Path, fallback: &str, parse: impl Fn(&str) -> Result<T, String>) -> Option<T> {
+    println!("cargo::rerun-if-changed={}", path.display());
+    let r = std::fs::read_to_string(path).map_err(|e| e.to_string()).and_then(|t| parse(&t));
+    if let Err(e) = &r {
+        println!("cargo::warning={}: {e}; {fallback}", path.display());
+    }
+    r.ok()
+}
+
+/// A non-empty string field of someone's people.toml entry, as a Rust `Option<&str>` literal.
+fn name(v: Option<&str>) -> String {
+    match v.map(str::trim).filter(|s| !s.is_empty()) {
+        Some(x) => format!("Some({x:?})"),
+        None => "None".into(),
+    }
+}
+
+fn s(v: &Value, k: &str) -> String {
+    format!("{:?}", v.get(k).and_then(Value::as_str).unwrap_or(""))
+}
+
+fn n(v: &Value, k: &str) -> u64 {
+    v.get(k).and_then(Value::as_u64).unwrap_or(0)
+}
+
+fn rows(json: &Value, k: &str) -> Vec<Value> {
+    json.get(k).and_then(Value::as_array).cloned().unwrap_or_default()
+}
+
+fn generate(json: &Value, people: &toml::Table) -> String {
+    let mut o = String::new();
+    let _ = writeln!(o, "pub static TOTAL_COMMITS: u64 = {};", n(json, "commits"));
+    let _ = writeln!(o, "pub static CONTRIBUTORS: &[Contributor] = &[");
+    for c in rows(json, "contributors") {
+        let login = c.get("login").and_then(Value::as_str).unwrap_or("");
+        if login.is_empty() {
+            continue;
+        }
+        // Names only from a verified, self-chosen people.toml entry.
+        let entry = people.get("people").and_then(|p| p.get(login)).filter(|_| c.get("people_entry").and_then(Value::as_bool) == Some(true));
+        let field = |k: &str| entry.and_then(|e| e.get(k)).and_then(toml::Value::as_str);
+        let synced = entry.and_then(|e| e.get("sync_github_name")).and_then(toml::Value::as_bool) == Some(true);
+        let display = field("display_name")
+            .filter(|s| !s.trim().is_empty())
+            .or_else(|| if synced { c.get("github_name").and_then(Value::as_str) } else { None });
+        let _ = writeln!(
+            o,
+            "    Contributor {{ login: {login:?}, display_name: {}, real_name: {}, prs: {}, commits: {}, lines_added: {}, lines_deleted: {}, binary_added: {}, binary_deleted: {}, first_commit: {}, last_commit: {} }},",
+            name(display),
+            name(field("real_name")),
+            n(&c, "prs"),
+            n(&c, "commits"),
+            n(&c, "lines_added"),
+            n(&c, "lines_deleted"),
+            n(&c, "binary_added"),
+            n(&c, "binary_deleted"),
+            s(&c, "first_commit"),
+            s(&c, "last_commit"),
+        );
+    }
+    let _ = writeln!(o, "];");
+    let _ = writeln!(o, "pub static MODELS: &[Model] = &[");
+    for m in rows(json, "models") {
+        let _ = writeln!(
+            o,
+            "    Model {{ company: {}, model: {}, version: {}, commits: {}, lines_added: {}, lines_deleted: {} }},",
+            s(&m, "company"),
+            s(&m, "model"),
+            s(&m, "version"),
+            n(&m, "commits"),
+            n(&m, "lines_added"),
+            n(&m, "lines_deleted"),
+        );
+    }
+    let _ = writeln!(o, "];");
+    o
+}

crates/ui-egui/src/canvas.rs

@@ -206,8 +206,11 @@ pub fn show(app: &mut VectorcraftApp, ui: &mut Ui) {
             painter.add(Shape::convex_polygon(xf.quad(ab.rect), Color32::WHITE, Stroke::NONE));
         }
     }
-    if app.ui.view.grid {
-        grid(&painter, &xf, doc.grid.spacing, doc.grid.subdivisions);
+    // The grid behind the art (Guides & Grid › Grids In Back), else over it below.
+    let grid_look = app.ui.view.grid.then(|| LineLook::grid(&app.session.prefs));
+    let grids_in_back = app.session.prefs.grids_in_back;
+    if let Some(look) = grid_look.filter(|_| grids_in_back) {
+        grid(&painter, &xf, doc.grid.spacing, doc.grid.subdivisions, look);
     }
 
     // Artwork raster.
@@ -287,6 +290,9 @@ pub fn show(app: &mut VectorcraftApp, ui: &mut Ui) {
         let b = xf.to_screen(old.to_doc(rect.max));
         painter.image(tex.id(), egui::Rect::from_min_max(a, b), egui::Rect::from_min_max(pos2(0.0, 0.0), pos2(1.0, 1.0)), Color32::WHITE);
     }
+    if let Some(look) = grid_look.filter(|_| !grids_in_back) {
+        grid(&painter, &xf, doc.grid.spacing, doc.grid.subdivisions, look);
+    }
     // Artboard edges and names.
     let active_ab = 0;
     for (i, ab) in doc.artboards.iter().enumerate() {
@@ -308,7 +314,11 @@ pub fn show(app: &mut VectorcraftApp, ui: &mut Ui) {
         }
     }
     if app.ui.view.guides {
-        for g in &doc.guides {
+        let look = LineLook::guides(&app.session.prefs, &t);
+        // Selected guides in the selection colour.
+        let picked = LineLook { color: t.selection, ..look };
+        let selected: &[usize] = app.session.active().map_or(&[], |st| &st.selection.guides);
+        for (i, g) in doc.guides.iter().enumerate() {
             let (a, b) = if g.vertical {
                 let x = xf.to_screen(Point::new(g.pos, 0.0)).x;
                 (pos2(x, rect.top()), pos2(x, rect.bottom()))
@@ -316,7 +326,7 @@ pub fn show(app: &mut VectorcraftApp, ui: &mut Ui) {
                 let y = xf.to_screen(Point::new(0.0, g.pos)).y;
                 (pos2(rect.left(), y), pos2(rect.right(), y))
             };
-            painter.line_segment([a, b], Stroke::new(1.0, t.guide));
+            if selected.contains(&i) { picked } else { look }.guide(&painter, a, b);
         }
     }
 
@@ -418,8 +428,10 @@ fn cursor_icon(c: Cursor) -> egui::CursorIcon {
 }
 
 fn handle_input(app: &mut VectorcraftApp, ui: &Ui, resp: &egui::Response, rect: egui::Rect) {
-    let (pointer, m, space, scroll, zoom_delta) =
-        ui.input(|i| (i.pointer.clone(), i.modifiers, i.key_down(egui::Key::Space), i.smooth_scroll_delta, i.zoom_delta()));
+    let line = ui.ctx().options(|o| o.input_options.line_scroll_speed);
+    let wheel_zooms = app.session.prefs.zoom_with_mouse_wheel;
+    let (pointer, m, space, (factor, scroll)) =
+        ui.input(|i| (i.pointer.clone(), i.modifiers, i.key_down(egui::Key::Space), wheel(i, wheel_zooms, line, rect.height())));
     let v = *app.view().unwrap_or(&View::default());
     let xf = Xf::new(rect, &v);
     let hover = pointer.hover_pos().filter(|p| rect.contains(*p));
@@ -427,12 +439,8 @@ fn handle_input(app: &mut VectorcraftApp, ui: &Ui, resp: &egui::Response, rect:
     let view = app.view_info();
     let drag: Option<Drag> = ui.data(|d| d.get_temp(drag_id()));
 
-    // Zoom: pinch / Cmd-scroll / Alt-scroll around the pointer. Plain scroll pans.
+    // Zoom around the pointer, or scroll ([`wheel`]).
     if resp.hovered() {
-        let mut factor = zoom_delta as f64;
-        if m.alt && scroll.y != 0.0 {
-            factor *= (scroll.y as f64 * 0.01).exp();
-        }
         if (factor - 1.0).abs() > 1e-6 {
             if let (Some(p), Some(vm)) = (hover, app.view_mut()) {
                 let before = xf.to_doc(p);
@@ -441,8 +449,7 @@ fn handle_input(app: &mut VectorcraftApp, ui: &Ui, resp: &egui::Response, rect:
                 let after = nx.to_doc(p);
                 vm.center += before - after;
             }
-        } else if (scroll.x != 0.0 || scroll.y != 0.0)
-            && !m.alt
+        } else if scroll != egui::Vec2::ZERO
             && let Some(vm) = app.view_mut()
         {
             let d = Xf { rect, zoom: vm.zoom, center: vm.center, rot: vm.rotation.to_radians() }.delta_to_doc(scroll);
@@ -481,7 +488,9 @@ fn handle_input(app: &mut VectorcraftApp, ui: &Ui, resp: &egui::Response, rect:
                 app.select_tool(if is_selection_tool(&last) { &last } else { "selection" });
                 kind = Drag::TempSelect;
             }
-            let ev = PointerEvent { kind: PointerKind::Down, pos: xf.to_doc(p), mods: mods(m, space), pressure: pen_pressure(ui, true) };
+            // Cmd only brought the selection tool: its click is a plain one, not Select Behind.
+            let mods = Mods { cmd: m.command && kind != Drag::TempSelect, ..mods(m, space) };
+            let ev = PointerEvent { kind: PointerKind::Down, pos: xf.to_doc(p), mods, pressure: pen_pressure(ui, true) };
             dispatch(app, &ev, view);
             kind
         };
@@ -591,6 +600,46 @@ fn handle_input(app: &mut VectorcraftApp, ui: &Ui, resp: &egui::Response, rect:
     }
 }
 
+/// How much one point of wheel motion zooms (as `exp(points × WHEEL_ZOOM)`).
+const WHEEL_ZOOM: f64 = 0.01;
+
+/// What the wheel and a pinch did over the canvas this frame: a zoom factor (about the pointer)
+/// and a scroll (screen points the content moves). The wheel scrolls, Cmd- and Alt-wheel zoom.
+/// With General › Zoom with Mouse Wheel (`wheel_zooms`) the wheel zooms, Shift-wheel scrolls up
+/// and down and Cmd/Ctrl-wheel sideways. `line` and `page`: points per wheel line and page.
+fn wheel(i: &egui::InputState, wheel_zooms: bool, line: f32, page: f32) -> (f64, egui::Vec2) {
+    if !wheel_zooms {
+        // egui makes Cmd-wheel (and a pinch) its zoom and the rest a smoothed scroll.
+        let (zoom, scroll) = (f64::from(i.zoom_delta()), i.smooth_scroll_delta);
+        return if i.modifiers.alt && scroll.y != 0.0 { (zoom * (f64::from(scroll.y) * WHEEL_ZOOM).exp(), egui::Vec2::ZERO) } else { (zoom, scroll) };
+    }
+    // The wheel events themselves: egui's own handling turns Cmd-wheel into a zoom.
+    let mut zoom = i.multi_touch().map_or(1.0, |t| f64::from(t.zoom_delta));
+    let mut scroll = egui::Vec2::ZERO;
+    for e in &i.events {
+        match e {
+            egui::Event::MouseWheel { unit, delta, modifiers, .. } => {
+                let d = match unit {
+                    egui::MouseWheelUnit::Point => *delta,
+                    egui::MouseWheelUnit::Line => *delta * line,
+                    egui::MouseWheelUnit::Page => *delta * page,
+                };
+                if modifiers.command {
+                    scroll.x += d.x + d.y;
+                } else if modifiers.shift {
+                    scroll.y += d.x + d.y;
+                } else {
+                    zoom *= (f64::from(d.y) * WHEEL_ZOOM).exp();
+                    scroll.x += d.x;
+                }
+            }
+            egui::Event::Zoom(f) => zoom *= f64::from(*f),
+            _ => {}
+        }
+    }
+    (zoom, scroll)
+}
+
 /// A Selection tool move dragged off the canvas (to `p`, over a panel) turns into a panel drag of
 /// the selected art ([`widgets::PanelDrag::Art`]): the move is dropped, so the art stays where it
 /// was, and the panel it is released on takes it (the Graphic Styles panel makes a style of it).
@@ -675,28 +724,82 @@ fn checker(p: &egui::Painter, quad: &[Pos2], ab: Rect, zoom: f64, tex: egui::Tex
     p.add(Shape::mesh(mesh));
 }
 
-fn grid(p: &egui::Painter, xf: &Xf, spacing: f64, subdiv: u32) {
+/// The look of the grid or of the guides (Preferences › Guides & Grid › Color and Style).
+#[derive(Clone, Copy)]
+struct LineLook {
+    color: Color32,
+    dots: bool,
+}
+
+impl LineLook {
+    fn grid(prefs: &vectorcraft_engine::Prefs) -> Self {
+        Self { color: pref_color(&prefs.grid_color, Color32::from_gray(200)), dots: prefs.grid_style == "dots" }
+    }
+
+    fn guides(prefs: &vectorcraft_engine::Prefs, t: &Tokens) -> Self {
+        Self { color: pref_color(&prefs.guide_color, t.guide), dots: prefs.guide_style == "dots" }
+    }
+
+    /// A guide from `a` to `b`: a line, or dots.
+    fn guide(self, p: &egui::Painter, a: Pos2, b: Pos2) {
+        if self.dots {
+            p.extend(Shape::dotted_line(&[a, b], self.color, 4.0, 0.75));
+        } else {
+            p.line_segment([a, b], Stroke::new(1.0, self.color));
+        }
+    }
+}
+
+/// A `#rrggbb` colour preference, `fallback` when it doesn't parse.
+fn pref_color(hex: &str, fallback: Color32) -> Color32 {
+    vectorcraft_color::Color::from_hex(hex).map_or(fallback, |c| crate::panels::c32(&c))
+}
+
+/// The grid (View → Show Grid): a gridline every `spacing` and `subdiv` lighter lines between
+/// (left out when they would crowd). In the Dots style, a dot where gridlines cross the
+/// subdivisions instead.
+fn grid(p: &egui::Painter, xf: &Xf, spacing: f64, subdiv: u32, look: LineLook) {
     let r = xf.rect;
     let a = xf.to_doc(r.min);
     let b = xf.to_doc(r.max);
     let sub = spacing / subdiv.max(1) as f64;
     let step = if sub * xf.zoom >= 6.0 { sub } else { spacing };
-    if step * xf.zoom < 4.0 {
+    // Dots crowd sooner than lines.
+    if step * xf.zoom < 4.0 || (look.dots && spacing * xf.zoom < 8.0) {
         return;
     }
-    let mut x = (a.x / step).floor() * step;
-    while x <= b.x {
-        let major = (x / spacing).round() * spacing == x || (x / spacing - (x / spacing).round()).abs() < 1e-6;
-        let sx = xf.to_screen(Point::new(x, 0.0)).x;
-        p.line_segment([pos2(sx, r.top()), pos2(sx, r.bottom())], Stroke::new(1.0, Color32::from_black_alpha(if major { 60 } else { 22 })));
-        x += step;
+    let major = |v: f64| (v / spacing - (v / spacing).round()).abs() < 1e-6;
+    // The lines across the view, on screen, each with whether it is a gridline.
+    let lines = |from: f64, to: f64, screen: &dyn Fn(f64) -> f32| {
+        let mut v = (from / step).floor() * step;
+        let mut out = vec![];
+        while v <= to {
+            out.push((screen(v), major(v)));
+            v += step;
+        }
+        out
+    };
+    let xs = lines(a.x, b.x, &|x| xf.to_screen(Point::new(x, 0.0)).x);
+    let ys = lines(a.y, b.y, &|y| xf.to_screen(Point::new(0.0, y)).y);
+    if look.dots {
+        let mut mesh = egui::Mesh::default();
+        for &(x, mx) in &xs {
+            for &(y, my) in &ys {
+                if mx || my {
+                    mesh.add_colored_rect(egui::Rect::from_center_size(pos2(x, y), vec2(1.5, 1.5)), look.color);
+                }
+            }
+        }
+        p.add(Shape::mesh(mesh));
+        return;
     }
-    let mut y = (a.y / step).floor() * step;
-    while y <= b.y {
-        let major = (y / spacing - (y / spacing).round()).abs() < 1e-6;
-        let sy = xf.to_screen(Point::new(0.0, y)).y;
-        p.line_segment([pos2(r.left(), sy), pos2(r.right(), sy)], Stroke::new(1.0, Color32::from_black_alpha(if major { 60 } else { 22 })));
-        y += step;
+    let minor = look.color.gamma_multiply(0.4);
+    let stroke = |major: bool| Stroke::new(1.0, if major { look.color } else { minor });
+    for (x, m) in xs {
+        p.line_segment([pos2(x, r.top()), pos2(x, r.bottom())], stroke(m));
+    }
+    for (y, m) in ys {
+        p.line_segment([pos2(r.left(), y), pos2(r.right(), y)], stroke(m));
     }
 }
 
@@ -717,24 +820,33 @@ fn ruler_rects(full: egui::Rect) -> [egui::Rect; 3] {
 }
 
 /// A drag from a ruler onto the canvas makes a guide where the button is released: a horizontal
-/// one from the top ruler, a vertical one from the left ruler. Released anywhere else, it makes
-/// none.
+/// one from the top ruler, a vertical one from the left ruler; with Shift on the nearest ruler
+/// tick. Released anywhere else, it makes none.
 fn ruler_guides(app: &mut VectorcraftApp, ui: &Ui, full: egui::Rect, canvas: egui::Rect, xf: &Xf, t: &Tokens) {
     let [top, left, _] = ruler_rects(full);
+    let shift = ui.input(|i| i.modifiers.shift);
     for (r, vertical, id) in [(top, false, "ruler-top"), (left, true, "ruler-left")] {
         let resp = ui.interact(r, egui::Id::new(id), Sense::drag());
         let Some(p) = resp.interact_pointer_pos().filter(|p| canvas.contains(*p)) else { continue };
+        let d = xf.to_doc(p);
+        let mut pos = if vertical { d.x } else { d.y };
+        if shift {
+            pos = app.session.general_unit().snap_to_ruler_tick(pos, xf.zoom);
+        }
         if resp.drag_stopped() {
-            let d = xf.to_doc(p);
             // The new guide shows even if guides were hidden.
             app.ui.view.guides = true;
-            if let Err(e) = app.run("guide.add", json!({ "vertical": vertical, "pos": if vertical { d.x } else { d.y } })) {
+            if let Err(e) = app.run("guide.add", json!({ "vertical": vertical, "pos": pos })) {
                 app.status(e);
             }
         } else if resp.dragged() {
-            let line =
-                if vertical { [pos2(p.x, canvas.top()), pos2(p.x, canvas.bottom())] } else { [pos2(canvas.left(), p.y), pos2(canvas.right(), p.y)] };
-            ui.painter_at(canvas).line_segment(line, Stroke::new(1.0, t.guide));
+            let at = xf.to_screen(if vertical { Point::new(pos, d.y) } else { Point::new(d.x, pos) });
+            let (a, b) = if vertical {
+                (pos2(at.x, canvas.top()), pos2(at.x, canvas.bottom()))
+            } else {
+                (pos2(canvas.left(), at.y), pos2(canvas.right(), at.y))
+            };
+            LineLook::guides(&app.session.prefs, t).guide(&ui.painter_at(canvas), a, b);
         }
     }
 }
@@ -753,8 +865,7 @@ fn rulers(ui: &Ui, full: egui::Rect, xf: &Xf, hover: Option<Point>, unit: Unit,
     // Pick a label step (in `unit`) that gives ≥ 50 px between labels; positions below are in `unit`
     // (`per` points each).
     let per = unit.points();
-    let steps = [0.01, 0.02, 0.05, 0.1, 0.2, 0.5, 1.0, 2.0, 5.0, 10.0, 25.0, 50.0, 100.0, 200.0, 500.0, 1000.0, 2000.0, 5000.0, 10000.0];
-    let step = steps.iter().copied().find(|s| s * per * xf.zoom >= 50.0).unwrap_or(10000.0);
+    let step = unit.ruler_step(xf.zoom);
     let minor = step / 10.0;
     let font = egui::FontId::proportional(9.5);
     let a = xf.to_doc(top.left_top());
@@ -895,9 +1006,15 @@ fn walk_drawn<'a>(n: &'a Node, f: &mut impl FnMut(&'a Node)) {
     }
 }
 
-/// The topmost editable object under document point `p` at `zoom` (3 px tolerance).
+/// The topmost editable object under document point `p` at `zoom`, as the selection tools pick it
+/// (Selection & Anchor Display › Tolerance and Object Selection by Path Only).
 fn hit_at(app: &VectorcraftApp, p: Point, zoom: f64) -> Option<vectorcraft_doc::hit::Hit> {
-    let opt = vectorcraft_doc::hit::HitOptions { tol: 3.0 / zoom, outline: app.ui.view.outline, path_only: false };
+    let prefs = &app.session.prefs;
+    let opt = vectorcraft_doc::hit::HitOptions {
+        tol: prefs.selection_tolerance / zoom,
+        outline: app.ui.view.outline,
+        path_only: prefs.object_selection_by_path_only,
+    };
     vectorcraft_doc::hit::hit_test(&app.session.active()?.doc, p, opt)
 }
 
@@ -1090,10 +1207,7 @@ fn slice_overlay(app: &mut VectorcraftApp, p: &egui::Painter, xf: &Xf) {
         return;
     }
     let prefs = &app.session.prefs;
-    let line = vectorcraft_color::Color::from_hex(&prefs.slice_line_color).map_or(Color32::from_rgb(0xff, 0x3f, 0x3f), |c| {
-        let [r, g, b, _] = c.to_rgba8(1.0);
-        Color32::from_rgb(r, g, b)
-    });
+    let line = pref_color(&prefs.slice_line_color, Color32::from_rgb(0xff, 0x3f, 0x3f));
     let dim = line.gamma_multiply(0.55);
     let selected = &st.selection.slices;
     let objects = &st.selection.objects;
@@ -1163,6 +1277,10 @@ fn selection_overlay(app: &mut VectorcraftApp, p: &egui::Painter, xf: &Xf) {
     let Some(st) = app.session.active() else { return };
     let tool = app.session.tool_id();
     let direct = matches!(tool, "directSelection" | "pen" | "addAnchor" | "deleteAnchor" | "anchorPoint" | "curvature");
+    // Selection & Anchor Display › Size (1–7, 3 the default): anchors, handles and the bounding
+    // box's handles a point bigger or smaller per step.
+    let grow = app.session.prefs.anchor_size.clamp(1, 7) as f32 - 3.0;
+    let anchor = |direct: bool| grow + if direct { 5.0 } else { 4.0 };
     for id in &st.selection.objects {
         let Some(n) = st.doc.node(*id) else { continue };
         let color = c32(st.doc.layer_color(*id));
@@ -1173,7 +1291,7 @@ fn selection_overlay(app: &mut VectorcraftApp, p: &egui::Painter, xf: &Xf) {
         walk_drawn(n, &mut |c| {
             if let Some((_, Some(grid))) = vectorcraft_doc::live::envelope_overlay(c) {
                 for q in &grid.points {
-                    anchor_square(p, xf.to_screen(q.p), color, false, if direct { 5.0 } else { 4.0 });
+                    anchor_square(p, xf.to_screen(q.p), color, false, anchor(direct));
                 }
                 return;
             }
@@ -1189,24 +1307,18 @@ fn selection_overlay(app: &mut VectorcraftApp, p: &egui::Painter, xf: &Xf) {
                         if h.distance(a.p) > 1e-6 {
                             let hp = xf.to_screen(h);
                             p.line_segment([sp, hp], Stroke::new(1.0, color));
-                            p.circle_filled(hp, 2.75, color);
+                            p.circle_filled(hp, 2.75 + grow / 2.0, color);
                         }
                     }
                 }
-                anchor_square(
-                    p,
-                    sp,
-                    if sel && partial.is_some() { selected_anchor(color) } else { color },
-                    sel,
-                    if partial.is_some() || direct { 5.0 } else { 4.0 },
-                );
+                anchor_square(p, sp, if sel && partial.is_some() { selected_anchor(color) } else { color }, sel, anchor(partial.is_some() || direct));
             }
         });
         // Centre point (Attributes panel → Show Center).
         if n.shows_center()
             && let Some(b) = n.geometric_bounds()
         {
-            anchor_square(p, xf.to_screen(b.center()), color, true, 4.0);
+            anchor_square(p, xf.to_screen(b.center()), color, true, anchor(false));
         }
         // Text: baseline marker (area type shows its frame instead, which may not be a rectangle).
         if let NodeKind::Text(tx) = &n.kind
@@ -1230,7 +1342,7 @@ fn selection_overlay(app: &mut VectorcraftApp, p: &egui::Painter, xf: &Xf) {
         let color = c32(st.doc.layer_color(b));
         stroke_path(p, &path.to_bezpath(), xf, Stroke::new(1.0, color));
         for (_, _, a) in path.anchors() {
-            anchor_square(p, xf.to_screen(a.p), color, false, if direct { 5.0 } else { 4.0 });
+            anchor_square(p, xf.to_screen(a.p), color, false, anchor(direct));
         }
     }
     // Live Corners widgets (Selection / Direct Selection on a single live rectangle).
@@ -1251,7 +1363,7 @@ fn selection_overlay(app: &mut VectorcraftApp, p: &egui::Painter, xf: &Xf) {
         p.add(Shape::closed_line(b.corners().iter().map(|q| xf.to_screen(*q)).collect(), Stroke::new(1.0, color)));
         for h in vectorcraft_tools::bbox::Handle::ALL {
             let c = xf.to_screen(b.to_doc() * h.pos(b.rect));
-            let hr = egui::Rect::from_center_size(c, vec2(6.0, 6.0));
+            let hr = egui::Rect::from_center_size(c, vec2(6.0 + grow, 6.0 + grow));
             p.rect_filled(hr, 0.0, Color32::WHITE);
             p.rect_stroke(hr, 0.0, Stroke::new(1.0, color), StrokeKind::Inside);
         }
@@ -1592,6 +1704,69 @@ mod tests {
         assert_eq!(app.session.active().unwrap().doc.art_bounds(), None, "the tool drew nothing");
     }
 
+    /// #414: guides dragged out of the rulers are picked and dragged with the Selection tool
+    /// (highlighted while selected), go with Delete or Backspace, and dragged back onto their
+    /// ruler.
+    #[test]
+    fn the_selection_tool_moves_and_deletes_ruler_guides() {
+        let mut app = VectorcraftApp::new(Session::new(), Default::default());
+        app.session.execute("file.new", &json!({"width": 400, "height": 300})).unwrap();
+        // A square under the guides: the press takes the guide.
+        app.session.execute("shape.rectangle", &json!({"x": 50, "y": 50, "width": 300, "height": 200})).unwrap();
+        app.session.execute("select.none", &json!({})).unwrap();
+        let art = app.session.active().unwrap().doc.art_bounds();
+        app.ui.view.rulers = true;
+        app.select_tool("selection");
+        let ctx = egui::Context::default();
+        frame(&mut app, &ctx, vec![]);
+        let rect = app.canvas_rect.unwrap();
+        let xf = Xf::new(rect, app.view().unwrap());
+        let button = |pos, pressed| egui::Event::PointerButton { pos, button: egui::PointerButton::Primary, pressed, modifiers: Default::default() };
+        let drag = |app: &mut VectorcraftApp, from: Pos2, to: Pos2| {
+            frame(app, &ctx, vec![egui::Event::PointerMoved(from)]);
+            frame(app, &ctx, vec![button(from, true)]);
+            frame(app, &ctx, vec![egui::Event::PointerMoved(to)]);
+            frame(app, &ctx, vec![button(to, false)]);
+        };
+        let guides = |app: &VectorcraftApp| app.session.active().unwrap().doc.guides.iter().map(|g| (g.vertical, g.pos)).collect::<Vec<_>>();
+        // Two guides out of the rulers.
+        let (h, v) = (pos2(rect.center().x + 30.0, rect.center().y + 20.0), pos2(rect.center().x - 40.0, rect.center().y));
+        drag(&mut app, pos2(h.x, rect.top() - RULER / 2.0), h);
+        drag(&mut app, pos2(rect.left() - RULER / 2.0, v.y), v);
+        assert_eq!(guides(&app), [(false, xf.to_doc(h).y), (true, xf.to_doc(v).x)]);
+        // Drag the horizontal one down 30 px (across the vertical one: the nearer is picked).
+        let to = pos2(h.x + 10.0, h.y + 30.0);
+        drag(&mut app, h, to);
+        let st = app.session.active().unwrap();
+        assert_eq!(guides(&app), [(false, xf.to_doc(to).y), (true, xf.to_doc(v).x)]);
+        assert_eq!((st.selection.guides.clone(), st.selection.objects.clone()), (vec![0], vec![]));
+        assert_eq!(st.history.undo.last().unwrap().label, "Move Guide");
+        let picked = Tokens::get(&ctx).selection;
+        let s = shapes(&mut app, &ctx);
+        assert!(s.iter().any(|s| matches!(s, Shape::LineSegment { points, stroke } if stroke.color == picked && points[0].y == to.y)), "highlighted");
+        // Backspace deletes the selected guide; Delete too.
+        let press = |app: &mut VectorcraftApp, key| {
+            let ev = egui::Event::Key { key, physical_key: None, pressed: true, repeat: false, modifiers: egui::Modifiers::NONE };
+            let mut out = ctx.run_ui(egui::RawInput { events: vec![ev], ..Default::default() }, |ui| crate::shortcuts::handle(app, ui.ctx()));
+            out.textures_delta.clear();
+        };
+        press(&mut app, egui::Key::Backspace);
+        assert_eq!(guides(&app), [(true, xf.to_doc(v).x)]);
+        app.session.execute("guide.select", &json!({"indexes": [0]})).unwrap();
+        press(&mut app, egui::Key::Delete);
+        assert!(guides(&app).is_empty());
+        app.session.execute("edit.undo", &json!({})).unwrap();
+        // Hide Guides deselects them.
+        app.session.execute("guide.select", &json!({"indexes": [0]})).unwrap();
+        app.run("view.guides", json!({})).unwrap();
+        assert!(app.session.active().unwrap().selection.guides.is_empty());
+        app.run("view.guides", json!({})).unwrap();
+        // Dragged back onto its ruler, the vertical guide goes.
+        drag(&mut app, v, pos2(rect.left() - RULER / 2.0, v.y + 20.0));
+        assert!(guides(&app).is_empty(), "{:?}", guides(&app));
+        assert_eq!(app.session.active().unwrap().doc.art_bounds(), art, "the square stayed");
+    }
+
     #[test]
     fn cmd_with_another_tool_drags_with_the_selection_tool_used_last() {
         let mut app = VectorcraftApp::new(Session::new(), Default::default());
@@ -1635,6 +1810,120 @@ mod tests {
         assert_eq!(cmd_drag(&mut app, inside, inside), "selection");
     }
 
+    /// One headless canvas frame → the shapes drawn, `Shape::Vec`s flattened.
+    fn shapes(app: &mut VectorcraftApp, ctx: &egui::Context) -> Vec<Shape> {
+        fn flat(s: Shape, out: &mut Vec<Shape>) {
+            match s {
+                Shape::Vec(v) => v.into_iter().for_each(|s| flat(s, out)),
+                s => out.push(s),
+            }
+        }
+        let raw = egui::RawInput { screen_rect: Some(egui::Rect::from_min_size(Pos2::ZERO, vec2(800.0, 600.0))), ..Default::default() };
+        let mut out = ctx.run_ui(raw, |ui| show(app, ui));
+        out.textures_delta.clear();
+        let mut v = vec![];
+        out.shapes.into_iter().for_each(|c| flat(c.shape, &mut v));
+        v
+    }
+
+    /// Guides & Grid (#394): the grid in Grid Color, behind the art or, with Grids In Back off,
+    /// over it, as dots in the Dots style; the guides in Guides Color and Style.
+    #[test]
+    fn grid_and_guides_take_their_preferences() {
+        let mut app = VectorcraftApp::new(Session::new(), Default::default());
+        app.session.execute("file.new", &json!({"width": 400, "height": 300})).unwrap();
+        app.session.execute("guide.add", &json!({"vertical": true, "pos": 100})).unwrap();
+        app.ui.view.grid = true;
+        app.ui.view.guides = true;
+        let (red, green) = (Color32::from_rgb(255, 0, 0), Color32::from_rgb(0, 255, 0));
+        app.session.execute("prefs.set", &json!({"values": {"gridColor": "#ff0000", "guideColor": "#00ff00"}})).unwrap();
+        let ctx = egui::Context::default();
+        let red_line = |s: &Shape| matches!(s, Shape::LineSegment { stroke, .. } if stroke.color == red);
+        // → (index of the first red gridline, index of the art's image).
+        let order = |app: &mut VectorcraftApp| {
+            let s = shapes(app, &ctx);
+            let art = app.canvas.texture.as_ref().unwrap().id();
+            let image = s.iter().position(|s| matches!(s, Shape::Mesh(m) if m.texture_id == art)).expect("the art");
+            (s.iter().position(red_line).expect("a gridline in Grid Color"), image, s)
+        };
+        let (grid, art, s) = order(&mut app);
+        assert!(grid < art, "Grids In Back: under the art");
+        assert!(s.iter().any(|s| matches!(s, Shape::LineSegment { stroke, .. } if stroke.color == green)), "the guide in Guides Color");
+        app.session.execute("prefs.set", &json!({"key": "gridsInBack", "value": false})).unwrap();
+        let (grid, art, _) = order(&mut app);
+        assert!(grid > art, "Grids In Back off: over the art");
+        app.session.execute("prefs.set", &json!({"values": {"gridStyle": "dots", "guideStyle": "dots"}})).unwrap();
+        let s = shapes(&mut app, &ctx);
+        assert!(!s.iter().any(red_line), "no gridlines in the Dots style");
+        let red_dots = |s: &Shape| matches!(s, Shape::Mesh(m) if m.vertices.len() > 40 && m.vertices.iter().all(|v| v.color == red));
+        assert!(s.iter().any(red_dots), "the grid's dots");
+        assert!(s.iter().any(|s| matches!(s, Shape::Circle(c) if c.fill == green)), "the guide dotted");
+    }
+
+    /// Selection & Anchor Display › Size (#394): anchors and the bounding box's handles grow.
+    #[test]
+    fn anchor_size_scales_anchors_and_handles() {
+        let mut app = VectorcraftApp::new(Session::new(), Default::default());
+        app.session.execute("file.new", &json!({"width": 400, "height": 300})).unwrap();
+        app.session.execute("shape.rectangle", &json!({"x": 150, "y": 100, "width": 100, "height": 100})).unwrap();
+        let ctx = egui::Context::default();
+        // The sizes of the squares drawn (anchors and handles are squares).
+        let sizes = |app: &mut VectorcraftApp| {
+            let mut v: Vec<f32> = shapes(app, &ctx).iter().filter_map(|s| if let Shape::Rect(r) = s { Some(r.rect.width()) } else { None }).collect();
+            v.sort_by(f32::total_cmp);
+            v.dedup();
+            v
+        };
+        let small = sizes(&mut app);
+        assert!(small.contains(&4.0) && small.contains(&6.0), "anchors 4, handles 6 by default: {small:?}");
+        app.session.execute("prefs.set", &json!({"key": "anchorSize", "value": 7})).unwrap();
+        let big = sizes(&mut app);
+        assert!(big.contains(&8.0) && big.contains(&10.0) && !big.contains(&4.0), "4 points bigger at 7: {big:?}");
+    }
+
+    /// General › Zoom with Mouse Wheel (#394), through the control channel's `ui.wheel`: off,
+    /// the wheel scrolls and Cmd-wheel zooms; on, the wheel zooms about the pointer, Shift-wheel
+    /// scrolls up and down and Cmd/Ctrl-wheel sideways.
+    #[test]
+    fn zoom_with_mouse_wheel_preference() {
+        let mut app = VectorcraftApp::new(Session::new(), Default::default());
+        app.session.execute("file.new", &json!({"width": 400, "height": 300})).unwrap();
+        let ctx = egui::Context::default();
+        // A canvas frame through the host's input hook (it feeds the control channel's input).
+        let run = |app: &mut VectorcraftApp| {
+            let mut raw = egui::RawInput { screen_rect: Some(egui::Rect::from_min_size(Pos2::ZERO, vec2(800.0, 600.0))), ..Default::default() };
+            app.raw_input_hook(&mut raw);
+            let mut out = ctx.run_ui(raw, |ui| show(app, ui));
+            out.textures_delta.clear();
+        };
+        run(&mut app);
+        let rect = app.canvas_rect.unwrap();
+        let at = rect.center() + vec2(60.0, 40.0);
+        // One notch up at `at`: → (zoom ratio, scroll in points, how far the point under `at` moved).
+        let turn = |app: &mut VectorcraftApp, shift: bool, cmd: bool| {
+            let before = *app.view().unwrap();
+            crate::tests_synthetic::control(app, &ctx, "ui.wheel", json!({"x": at.x, "y": at.y, "dy": 1, "shift": shift, "cmd": cmd}));
+            // egui spreads a notch over a few frames.
+            for _ in 0..40 {
+                run(app);
+            }
+            let after = *app.view().unwrap();
+            let moved = Xf::new(rect, &after).to_doc(at).distance(Xf::new(rect, &before).to_doc(at));
+            (after.zoom / before.zoom, (after.center - before.center) * after.zoom, moved)
+        };
+        let (zoom, scroll, _) = turn(&mut app, false, false);
+        assert!((zoom - 1.0).abs() < 1e-9 && scroll.x == 0.0 && scroll.y < -1.0, "off: the wheel scrolls up ({zoom}, {scroll:?})");
+        let (zoom, _, moved) = turn(&mut app, false, true);
+        assert!(zoom > 1.01 && moved < 1e-6, "off: Cmd-wheel zooms in about the pointer ({zoom}, {moved})");
+        app.session.execute("prefs.set", &json!({"key": "zoomWithMouseWheel", "value": true})).unwrap();
+        let (zoom, _, moved) = turn(&mut app, false, false);
+        assert!(zoom > 1.01 && moved < 1e-6, "on: the wheel zooms in about the pointer ({zoom}, {moved})");
+        let (zoom, scroll, _) = turn(&mut app, true, false);
+        assert!((zoom - 1.0).abs() < 1e-9 && scroll.x == 0.0 && scroll.y < -1.0, "on: Shift-wheel scrolls up ({zoom}, {scroll:?})");
+        let (zoom, scroll, _) = turn(&mut app, false, true);
+        assert!((zoom - 1.0).abs() < 1e-9 && scroll.x < -1.0 && scroll.y == 0.0, "on: Cmd-wheel scrolls sideways ({zoom}, {scroll:?})");
+    }
+
     #[test]
     fn cmd_space_zooms_and_space_pans_whatever_the_tool() {
         use egui::{Event, Modifiers};

crates/ui-egui/src/control.rs

@@ -105,6 +105,13 @@ fn key_from(name: &str) -> Option<egui::Key> {
     })
 }
 
+/// The modifier keys a request holds down (`cmd`, `ctrl`, `alt`, `shift`; `cmd` is Command on
+/// macOS, Ctrl elsewhere).
+fn modifiers(p: &Value) -> egui::Modifiers {
+    let b = |n: &str| p.get(n).and_then(Value::as_bool).unwrap_or(false);
+    egui::Modifiers { alt: b("alt"), ctrl: b("ctrl"), shift: b("shift"), mac_cmd: b("cmd") && cfg!(target_os = "macos"), command: b("cmd") }
+}
+
 pub fn handle(app: &mut VectorcraftApp, ctx: &egui::Context, req: &ControlRequest) -> Outcome {
     let p = &req.params;
     let s = |k: &str| p.get(k).and_then(Value::as_str);
@@ -159,14 +166,7 @@ pub fn handle(app: &mut VectorcraftApp, ctx: &egui::Context, req: &ControlReques
         }
         "ui.key" => {
             let Some(k) = s("key").and_then(key_from) else { return err("unknown or missing `key`") };
-            let b = |n: &str| p.get(n).and_then(Value::as_bool).unwrap_or(false);
-            let m = egui::Modifiers {
-                alt: b("alt"),
-                ctrl: b("ctrl"),
-                shift: b("shift"),
-                mac_cmd: b("cmd") && cfg!(target_os = "macos"),
-                command: b("cmd"),
-            };
+            let m = modifiers(p);
             app.synthetic.push(egui::Event::Key { key: k, physical_key: None, pressed: true, repeat: false, modifiers: m });
             // Typed text comes with the press, so it shares the key's frame and modifiers.
             if let Some(t) = s("text") {
@@ -189,14 +189,7 @@ pub fn handle(app: &mut VectorcraftApp, ctx: &egui::Context, req: &ControlReques
                 Some("right") | Some("secondary") => egui::PointerButton::Secondary,
                 _ => egui::PointerButton::Primary,
             };
-            let b = |n: &str| p.get(n).and_then(Value::as_bool).unwrap_or(false);
-            let modifiers = egui::Modifiers {
-                alt: b("alt"),
-                ctrl: b("ctrl"),
-                shift: b("shift"),
-                mac_cmd: b("cmd") && cfg!(target_os = "macos"),
-                command: b("cmd"),
-            };
+            let modifiers = modifiers(p);
             let a = egui::pos2(f("x"), f("y"));
             let end = if req.method == "ui.drag" { egui::pos2(f("toX"), f("toY")) } else { a };
             app.synthetic.push(egui::Event::PointerMoved(a));
@@ -217,6 +210,18 @@ pub fn handle(app: &mut VectorcraftApp, ctx: &egui::Context, req: &ControlReques
             ctx.request_repaint();
             ok(Value::Null)
         }
+        "ui.wheel" => {
+            // Mouse wheel notches over screen point (x, y): `dy` up (+) or down, `dx` sideways
+            // (`unit: "point"` for trackpad-like points), with modifiers as `ui.click` takes them.
+            let f = |k: &str| p.get(k).and_then(Value::as_f64).unwrap_or(0.0) as f32;
+            let unit = if s("unit") == Some("point") { egui::MouseWheelUnit::Point } else { egui::MouseWheelUnit::Line };
+            // Notches, not a flood: a turn stays within what a real wheel sends.
+            let delta = egui::vec2(f("dx"), f("dy")).clamp(egui::Vec2::splat(-100.0), egui::Vec2::splat(100.0));
+            app.synthetic.push(egui::Event::PointerMoved(egui::pos2(f("x"), f("y"))));
+            app.synthetic.push(egui::Event::MouseWheel { unit, delta, phase: egui::TouchPhase::Move, modifiers: modifiers(p) });
+            ctx.request_repaint();
+            ok(Value::Null)
+        }
         "ui.text" => {
             app.synthetic.push(egui::Event::Text(s("text").unwrap_or("").to_string()));
             ctx.request_repaint();

crates/ui-egui/src/credits.rs

@@ -0,0 +1,404 @@
+//! The About window's credits: every contributor (GitHub login always; display and real names only
+//! with recorded consent) and the AI models that helped. The tables are baked into the binary by
+//! build.rs from contributors/contributors.json (craftrules standards/contributors.md); nothing is
+//! read at run time.
+
+use std::cmp::Ordering;
+
+use egui::RichText;
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub struct Contributor {
+    pub login: &'static str,
+    pub display_name: Option<&'static str>,
+    pub real_name: Option<&'static str>,
+    pub prs: u64,
+    pub commits: u64,
+    pub lines_added: u64,
+    pub lines_deleted: u64,
+    pub binary_added: u64,
+    pub binary_deleted: u64,
+    /// ISO 8601 UTC; empty for someone credited only through a merged PR.
+    pub first_commit: &'static str,
+    pub last_commit: &'static str,
+}
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub struct Model {
+    pub company: &'static str,
+    pub model: &'static str,
+    pub version: &'static str,
+    pub commits: u64,
+    pub lines_added: u64,
+    pub lines_deleted: u64,
+}
+
+include!(concat!(env!("OUT_DIR"), "/credits.rs"));
+
+/// Which name to show. Display and real names fall back to the `@username` when not given.
+#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
+pub enum NameMode {
+    #[default]
+    Username,
+    DisplayName,
+    RealName,
+}
+
+impl NameMode {
+    pub const ALL: [NameMode; 3] = [NameMode::Username, NameMode::DisplayName, NameMode::RealName];
+
+    pub fn label(self) -> &'static str {
+        match self {
+            NameMode::Username => tl!("Username"),
+            NameMode::DisplayName => tl!("Display name"),
+            NameMode::RealName => tl!("Real name"),
+        }
+    }
+}
+
+#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
+pub enum SortKey {
+    Name,
+    Prs,
+    Commits,
+    LinesAdded,
+    LinesDeleted,
+    LinesDelta,
+    BinaryAdded,
+    BinaryDeleted,
+    #[default]
+    FirstCommit,
+    LastCommit,
+}
+
+impl SortKey {
+    pub const ALL: [SortKey; 10] = [
+        SortKey::Name,
+        SortKey::Prs,
+        SortKey::Commits,
+        SortKey::LinesAdded,
+        SortKey::LinesDeleted,
+        SortKey::LinesDelta,
+        SortKey::BinaryAdded,
+        SortKey::BinaryDeleted,
+        SortKey::FirstCommit,
+        SortKey::LastCommit,
+    ];
+
+    /// Menu label and table header, in the UI language (the short count headers stay as they are).
+    pub fn label(self) -> (&'static str, &'static str) {
+        match self {
+            SortKey::Name => (tl!("Name (A–Z)"), tl!("Name")),
+            SortKey::Prs => (tl!("Merged PRs"), "PRs"),
+            SortKey::Commits => (tl!("Commits"), tl!("Commits")),
+            SortKey::LinesAdded => (tl!("Lines added"), "+LOC"),
+            SortKey::LinesDeleted => (tl!("Lines deleted"), "−LOC"),
+            SortKey::LinesDelta => (tl!("Line delta"), "ΔLOC"),
+            SortKey::BinaryAdded => (tl!("Binary assets added"), "+Bin"),
+            SortKey::BinaryDeleted => (tl!("Binary assets removed"), "−Bin"),
+            SortKey::FirstCommit => (tl!("First commit"), tl!("First")),
+            SortKey::LastCommit => (tl!("Last commit"), tl!("Last")),
+        }
+    }
+
+    /// Names and dates read naturally oldest/A first; counts read biggest first.
+    pub fn default_ascending(self) -> bool {
+        matches!(self, SortKey::Name | SortKey::FirstCommit | SortKey::LastCommit)
+    }
+}
+
+impl Contributor {
+    pub fn name(&self, mode: NameMode) -> String {
+        let chosen = match mode {
+            NameMode::Username => None,
+            NameMode::DisplayName => self.display_name,
+            NameMode::RealName => self.real_name,
+        };
+        chosen.map_or_else(|| format!("@{}", self.login), str::to_string)
+    }
+
+    pub fn lines_delta(&self) -> i128 {
+        i128::from(self.lines_added) - i128::from(self.lines_deleted)
+    }
+
+    /// One line with everything we know, for tooltips.
+    pub fn summary(&self) -> String {
+        format!(
+            "@{}: {} PRs, {} commits, +{} / −{} lines (Δ {}), +{} / −{} binary assets, {} – {}",
+            self.login,
+            self.prs,
+            self.commits,
+            group(self.lines_added),
+            group(self.lines_deleted),
+            signed(self.lines_delta()),
+            self.binary_added,
+            self.binary_deleted,
+            day(self.first_commit),
+            day(self.last_commit),
+        )
+    }
+}
+
+/// Alphabetical key: case-insensitive, ignoring the `@` of usernames.
+fn name_key(name: &str) -> String {
+    name.trim_start_matches('@').to_lowercase()
+}
+
+fn compare(a: &Contributor, b: &Contributor, mode: NameMode, key: SortKey) -> Ordering {
+    match key {
+        SortKey::Name => name_key(&a.name(mode)).cmp(&name_key(&b.name(mode))),
+        SortKey::Prs => a.prs.cmp(&b.prs),
+        SortKey::Commits => a.commits.cmp(&b.commits),
+        SortKey::LinesAdded => a.lines_added.cmp(&b.lines_added),
+        SortKey::LinesDeleted => a.lines_deleted.cmp(&b.lines_deleted),
+        SortKey::LinesDelta => a.lines_delta().cmp(&b.lines_delta()),
+        SortKey::BinaryAdded => a.binary_added.cmp(&b.binary_added),
+        SortKey::BinaryDeleted => a.binary_deleted.cmp(&b.binary_deleted),
+        // A PR-only contributor (no commit date) sorts after everyone with a date.
+        SortKey::FirstCommit => dated(a.first_commit).cmp(&dated(b.first_commit)),
+        SortKey::LastCommit => dated(a.last_commit).cmp(&dated(b.last_commit)),
+    }
+}
+
+fn dated(d: &str) -> (bool, &str) {
+    (d.is_empty(), d)
+}
+
+/// Contributors in display order. Ties fall back to the name (A–Z) so the order is stable.
+pub fn sorted(list: &[Contributor], mode: NameMode, key: SortKey, ascending: bool) -> Vec<&Contributor> {
+    let mut v: Vec<&Contributor> = list.iter().collect();
+    v.sort_by(|a, b| {
+        let o = compare(a, b, mode, key);
+        let o = if ascending { o } else { o.reverse() };
+        o.then_with(|| compare(a, b, mode, SortKey::Name)).then_with(|| a.login.cmp(b.login))
+    });
+    v
+}
+
+fn group(n: u64) -> String {
+    let s = n.to_string();
+    let mut out = String::with_capacity(s.len() + s.len() / 3);
+    for (i, ch) in s.chars().enumerate() {
+        if i > 0 && (s.len() - i).is_multiple_of(3) {
+            out.push(',');
+        }
+        out.push(ch);
+    }
+    out
+}
+
+fn signed(n: i128) -> String {
+    let g = group(u64::try_from(n.unsigned_abs()).unwrap_or(u64::MAX));
+    if n < 0 { format!("−{g}") } else { format!("+{g}") }
+}
+
+fn day(iso: &str) -> &str {
+    if iso.is_empty() { "—" } else { iso.get(..10).unwrap_or(iso) }
+}
+
+/// The About window doesn't resize: long lists scroll inside it.
+const SCROLL_HEIGHT: f32 = 340.0;
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+struct View {
+    names: NameMode,
+    key: SortKey,
+    ascending: bool,
+    table: bool,
+}
+
+impl Default for View {
+    fn default() -> Self {
+        View { names: NameMode::Username, key: SortKey::FirstCommit, ascending: true, table: false }
+    }
+}
+
+/// About ▸ Contributors: a name toggle, a sort, and the list as a grab bag or a table.
+pub fn contributors_ui(ui: &mut egui::Ui) {
+    let id = egui::Id::new("credits_view");
+    let mut v = ui.data_mut(|d| d.get_temp::<View>(id)).unwrap_or_default();
+    ui.horizontal_wrapped(|ui| {
+        ui.label(tl!("Show"));
+        for m in NameMode::ALL {
+            if ui.selectable_label(v.names == m, m.label()).clicked() {
+                v.names = m;
+            }
+        }
+        ui.separator();
+        ui.label(tl!("Sort"));
+        egui::ComboBox::from_id_salt("credits_sort").selected_text(v.key.label().0).show_ui(ui, |ui| {
+            for k in SortKey::ALL {
+                if ui.selectable_label(v.key == k, k.label().0).clicked() {
+                    v.key = k;
+                    v.ascending = k.default_ascending();
+                }
+            }
+        });
+        if ui.button(if v.ascending { "▲" } else { "▼" }).on_hover_text(tl!("Reverse the order")).clicked() {
+            v.ascending = !v.ascending;
+        }
+        ui.separator();
+        if ui.selectable_label(!v.table, tl!("Grab bag")).clicked() {
+            v.table = false;
+        }
+        if ui.selectable_label(v.table, tl!("Table")).clicked() {
+            v.table = true;
+        }
+    });
+    let list = sorted(CONTRIBUTORS, v.names, v.key, v.ascending);
+    let (people, commits) = (group(list.len() as u64), group(TOTAL_COMMITS));
+    let counts = crate::i18n::fmt(tl!("{people} contributors · {commits} commits"), &[("people", &people), ("commits", &commits)]);
+    ui.label(RichText::new(counts).small().weak());
+    ui.separator();
+    egui::ScrollArea::both().max_height(SCROLL_HEIGHT).auto_shrink([false, true]).show(ui, |ui| {
+        if list.is_empty() {
+            ui.label(tl!("No contributor data was built into this copy."));
+        } else if v.table {
+            table(ui, &list, &mut v);
+        } else {
+            ui.horizontal_wrapped(|ui| {
+                for (i, c) in list.iter().enumerate() {
+                    if i > 0 {
+                        ui.label(RichText::new("·").weak());
+                    }
+                    ui.hyperlink_to(c.name(v.names), format!("https://github.com/{}", c.login)).on_hover_text(c.summary());
+                }
+            });
+        }
+    });
+    ui.data_mut(|d| d.insert_temp(id, v));
+}
+
+fn table(ui: &mut egui::Ui, list: &[&Contributor], v: &mut View) {
+    egui::Grid::new("credits_table").striped(true).num_columns(SortKey::ALL.len()).show(ui, |ui| {
+        for k in SortKey::ALL {
+            let arrow = if v.key == k { if v.ascending { " ▲" } else { " ▼" } } else { "" };
+            if ui.button(RichText::new(format!("{}{arrow}", k.label().1)).strong()).on_hover_text(k.label().0).clicked() {
+                if v.key == k {
+                    v.ascending = !v.ascending;
+                } else {
+                    v.key = k;
+                    v.ascending = k.default_ascending();
+                }
+            }
+        }
+        ui.end_row();
+        for c in list {
+            ui.hyperlink_to(c.name(v.names), format!("https://github.com/{}", c.login)).on_hover_text(c.summary());
+            ui.label(group(c.prs));
+            ui.label(group(c.commits));
+            ui.label(group(c.lines_added));
+            ui.label(group(c.lines_deleted));
+            ui.label(signed(c.lines_delta()));
+            ui.label(group(c.binary_added));
+            ui.label(group(c.binary_deleted));
+            ui.label(day(c.first_commit));
+            ui.label(day(c.last_commit));
+            ui.end_row();
+        }
+    });
+}
+
+/// About ▸ Models: AI models credited in Co-Authored-By trailers.
+pub fn models_ui(ui: &mut egui::Ui) {
+    if MODELS.is_empty() {
+        ui.label(tl!("No model credits were built into this copy."));
+        return;
+    }
+    let assisted: u64 = MODELS.iter().map(|m| m.commits).max().unwrap_or(0).max(1);
+    egui::ScrollArea::both().max_height(SCROLL_HEIGHT).auto_shrink([false, true]).show(ui, |ui| {
+        egui::Grid::new("credits_models").striped(true).num_columns(6).show(ui, |ui| {
+            for h in [tl!("Company"), tl!("Model"), tl!("Version"), tl!("Commits"), tl!("% of all commits"), tl!("Lines +/−")] {
+                ui.label(RichText::new(h).strong());
+            }
+            ui.end_row();
+            for m in MODELS {
+                ui.label(m.company);
+                ui.label(m.model);
+                ui.label(m.version);
+                ui.label(group(m.commits));
+                ui.label(format!("{:.0}%", 100.0 * m.commits as f64 / TOTAL_COMMITS.max(assisted) as f64));
+                ui.label(format!("+{} / −{}", group(m.lines_added), group(m.lines_deleted)));
+                ui.end_row();
+            }
+        });
+    });
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    fn c(
+        login: &'static str,
+        display: Option<&'static str>,
+        real: Option<&'static str>,
+        added: u64,
+        deleted: u64,
+        first: &'static str,
+    ) -> Contributor {
+        Contributor {
+            login,
+            display_name: display,
+            real_name: real,
+            prs: 0,
+            commits: 1,
+            lines_added: added,
+            lines_deleted: deleted,
+            binary_added: 0,
+            binary_deleted: 0,
+            first_commit: first,
+            last_commit: first,
+        }
+    }
+
+    fn people() -> [Contributor; 4] {
+        [
+            c("zed", None, None, 5, 50, "2026-01-02T00:00:00Z"),
+            c("Bob", Some("Ann"), None, 10, 0, "2026-01-01T00:00:00Z"),
+            c("alice", None, None, 7, 1, ""),
+            c("carol", None, Some("Dana"), 1, 0, "2026-01-03T00:00:00Z"),
+        ]
+    }
+
+    fn logins(v: &[&Contributor]) -> Vec<&'static str> {
+        v.iter().map(|c| c.login).collect()
+    }
+
+    #[test]
+    fn names_fall_back_to_the_username() {
+        let p = c("bob", Some("Bobby"), None, 0, 0, "");
+        assert_eq!(p.name(NameMode::Username), "@bob");
+        assert_eq!(p.name(NameMode::DisplayName), "Bobby");
+        assert_eq!(p.name(NameMode::RealName), "@bob");
+    }
+
+    #[test]
+    fn alphabetical_ignores_at_and_case() {
+        let all = people();
+        let v = sorted(&all, NameMode::Username, SortKey::Name, true);
+        assert_eq!(logins(&v), ["alice", "Bob", "carol", "zed"]);
+        let v = sorted(&all, NameMode::DisplayName, SortKey::Name, true);
+        assert_eq!(logins(&v), ["alice", "Bob", "carol", "zed"]); // "Ann" sorts with the @usernames
+        let v = sorted(&all, NameMode::RealName, SortKey::Name, false);
+        assert_eq!(logins(&v), ["zed", "carol", "Bob", "alice"]); // "Dana" between bob and zed
+    }
+
+    #[test]
+    fn delta_and_dates() {
+        let all = people();
+        let v = sorted(&all, NameMode::Username, SortKey::LinesDelta, false);
+        assert_eq!(logins(&v), ["Bob", "alice", "carol", "zed"]);
+        let v = sorted(&all, NameMode::Username, SortKey::FirstCommit, true);
+        assert_eq!(logins(&v), ["Bob", "zed", "carol", "alice"]); // undated last
+    }
+
+    #[test]
+    fn formatting() {
+        assert_eq!(group(1234567), "1,234,567");
+        assert_eq!(group(12), "12");
+        assert_eq!(signed(-1000), "−1,000");
+        assert_eq!(day("2026-10-07T18:45:23Z"), "2026-10-07");
+        assert_eq!(day(""), "—");
+    }
+}

crates/ui-egui/src/dialogs/about.rs

@@ -16,32 +16,60 @@ pub(super) fn show(app: &mut VectorcraftApp, ctx: &egui::Context) {
         .anchor(egui::Align2::CENTER_CENTER, [0.0, 0.0])
         .frame(egui::Frame::window(&ctx.global_style()).inner_margin(egui::Margin::same(18)))
         .show(ctx, |ui| {
-            ui.set_width(380.0);
+            // Tabs: About · Contributors · Models (the credits are compiled in, see `credits`).
+            let tab_id = egui::Id::new("about_tab");
+            let mut tab = ui.data_mut(|d| d.get_temp::<u8>(tab_id)).unwrap_or(0);
             ui.horizontal(|ui| {
-                let (r, _) = ui.allocate_exact_size(egui::vec2(44.0, 44.0), egui::Sense::hover());
-                crate::brand::paint_mark(ui, r);
-                ui.vertical(|ui| {
-                    ui.label(egui::RichText::new("VectorCraft").font(theme::semibold(22.0)));
-                    ui.label(crate::i18n::fmt(
-                        tl!("Version {version} — open-source vector illustration in pure Rust."),
-                        &[("version", env!("CARGO_PKG_VERSION"))],
-                    ));
-                });
+                for (i, label) in [tl!("About"), tl!("Contributors"), tl!("Models")].into_iter().enumerate() {
+                    let i = i as u8;
+                    if ui.selectable_label(tab == i, label).clicked() {
+                        tab = i;
+                    }
+                }
             });
-            ui.add_space(12.0);
-            crate::community::links(app, ui);
-            ui.add_space(12.0);
-            ui.label(
-                egui::RichText::new(tl!(
-                    "Part of ArtCraft. MIT OR Apache-2.0. Fonts: Source Sans 3, Inter, JetBrains Mono (OFL). Icons: Lucide (ISC) + VectorCraft."
-                ))
-                .size(11.0),
-            );
-            // The GPU the window renders with, for bug reports (Preferences › Performance picks it).
-            if let Some(adapter) = &app.graphics_adapter {
-                ui.add_space(6.0);
-                ui.label(egui::RichText::new(crate::i18n::fmt(tl!("Graphics: {adapter}"), &[("adapter", adapter.as_str())])).size(11.0));
+            ui.data_mut(|d| d.insert_temp(tab_id, tab));
+            ui.separator();
+            match tab {
+                1 => {
+                    ui.set_width(660.0);
+                    crate::credits::contributors_ui(ui);
+                }
+                2 => {
+                    ui.set_width(660.0);
+                    crate::credits::models_ui(ui);
+                }
+                _ => about_tab(app, ui),
             }
         });
     app.ui.about = open;
 }
+
+/// The About tab: mark, version, community links, licences and the GPU in use.
+fn about_tab(app: &mut VectorcraftApp, ui: &mut egui::Ui) {
+    ui.set_width(380.0);
+    ui.horizontal(|ui| {
+        let (r, _) = ui.allocate_exact_size(egui::vec2(44.0, 44.0), egui::Sense::hover());
+        crate::brand::paint_mark(ui, r);
+        ui.vertical(|ui| {
+            ui.label(egui::RichText::new("VectorCraft").font(theme::semibold(22.0)));
+            ui.label(crate::i18n::fmt(
+                tl!("Version {version} — open-source vector illustration in pure Rust."),
+                &[("version", env!("CARGO_PKG_VERSION"))],
+            ));
+        });
+    });
+    ui.add_space(12.0);
+    crate::community::links(app, ui);
+    ui.add_space(12.0);
+    ui.label(
+        egui::RichText::new(tl!(
+            "Part of ArtCraft. MIT OR Apache-2.0. Fonts: Source Sans 3, Inter, JetBrains Mono (OFL). Icons: Lucide (ISC) + VectorCraft."
+        ))
+        .size(11.0),
+    );
+    // The GPU the window renders with, for bug reports (Preferences › Performance picks it).
+    if let Some(adapter) = &app.graphics_adapter {
+        ui.add_space(6.0);
+        ui.label(egui::RichText::new(crate::i18n::fmt(tl!("Graphics: {adapter}"), &[("adapter", adapter.as_str())])).size(11.0));
+    }
+}

crates/ui-egui/src/i18n/cs.tsv

@@ -572,3 +572,34 @@
 	Collapse Panels to Icons	Sbalit panely na ikony
 	Collapse to Icons	Sbalit na ikony
 	Expand Panels	Rozbalit panely
+
+# About › Contributors / Models (credits.rs)
+	About	O aplikaci
+	Contributors	Přispěvatelé
+	Models	Modely
+	Username	Uživatelské jméno
+	Display name	Zobrazované jméno
+	Real name	Skutečné jméno
+	Sort	Řadit
+	Reverse the order	Obrátit pořadí
+	Grab bag	Volný seznam
+	Table	Tabulka
+	Name (A–Z)	Jméno (A–Z)
+	Merged PRs	Sloučené PR
+	Commits	Commity
+	Lines added	Přidané řádky
+	Lines deleted	Odstraněné řádky
+	Line delta	Rozdíl řádků
+	Binary assets added	Přidané binární soubory
+	Binary assets removed	Odstraněné binární soubory
+	First commit	První commit
+	Last commit	Poslední commit
+	First	První
+	Last	Poslední
+	{people} contributors · {commits} commits	Přispěvatelé: {people} · Commity: {commits}
+	No contributor data was built into this copy.	Tato kopie neobsahuje údaje o přispěvatelích.
+	No model credits were built into this copy.	Tato kopie neobsahuje uvedení modelů.
+	Company	Společnost
+	Version	Verze
+	% of all commits	% všech commitů
+	Lines +/−	Řádky +/−

crates/ui-egui/src/i18n/es.tsv

@@ -1928,6 +1928,11 @@
 	Recent Font	Fuente reciente
 	Recent Font 1	Fuente reciente 1
 	Recent Font 10	Fuente reciente 10
+	Recent Font 11	Fuente reciente 11
+	Recent Font 12	Fuente reciente 12
+	Recent Font 13	Fuente reciente 13
+	Recent Font 14	Fuente reciente 14
+	Recent Font 15	Fuente reciente 15
 	Recent Font 2	Fuente reciente 2
 	Recent Font 3	Fuente reciente 3
 	Recent Font 4	Fuente reciente 4
@@ -2268,6 +2273,7 @@
 	Select art and use New Brush to make one.	Selecciona una ilustración y usa Nuevo pincel para crear uno.
 	Select Freeform Point	Seleccionar punto libre
 	Select Gradient Stop	Seleccionar parada de degradado
+	Select Guides	Seleccionar guías
 	Select Objects	Seleccionar objetos
 	Select objects to see their CSS, or Generate CSS for the whole document.	Selecciona objetos para ver su CSS, o usa Generar CSS para todo el documento.
 	Select Same Tint %	Seleccionar mismo % de matiz
@@ -2972,3 +2978,34 @@
 # Leading model (Paragraph panel menu, East Asian options).
 	Top-to-Top Leading	Interlineado de superior a superior
 	Bottom-to-Bottom Leading	Interlineado de inferior a inferior
+
+# About › Contributors / Models (credits.rs)
+	About	Acerca de
+	Contributors	Colaboradores
+	Models	Modelos
+	Username	Nombre de usuario
+	Display name	Nombre visible
+	Real name	Nombre real
+	Sort	Ordenar
+	Reverse the order	Invertir el orden
+	Grab bag	Lista libre
+	Table	Tabla
+	Name (A–Z)	Nombre (A–Z)
+	Merged PRs	PR fusionadas
+	Commits	Commits
+	Lines added	Líneas agregadas
+	Lines deleted	Líneas eliminadas
+	Line delta	Diferencia de líneas
+	Binary assets added	Recursos binarios agregados
+	Binary assets removed	Recursos binarios eliminados
+	First commit	Primer commit
+	Last commit	Último commit
+	First	Primero
+	Last	Último
+	{people} contributors · {commits} commits	{people} colaboradores · {commits} commits
+	No contributor data was built into this copy.	Esta copia no incluye datos de colaboradores.
+	No model credits were built into this copy.	Esta copia no incluye créditos de modelos.
+	Company	Empresa
+	Version	Versión
+	% of all commits	% de todos los commits
+	Lines +/−	Líneas +/−

crates/ui-egui/src/i18n/ja.tsv

@@ -1948,6 +1948,11 @@
 	Recent Files	最近使ったファイル
 	Recent Font 1	最近使ったフォント 1
 	Recent Font 10	最近使ったフォント 10
+	Recent Font 11	最近使ったフォント 11
+	Recent Font 12	最近使ったフォント 12
+	Recent Font 13	最近使ったフォント 13
+	Recent Font 14	最近使ったフォント 14
+	Recent Font 15	最近使ったフォント 15
 	Recent Font 2	最近使ったフォント 2
 	Recent Font 3	最近使ったフォント 3
 	Recent Font 4	最近使ったフォント 4
@@ -2839,6 +2844,7 @@
 	Search	検索
 	Security	セキュリティ
 	Select All Pins	すべてのピンを選択
+	Select Guides	ガイドを選択
 	Select text or click into text with the Type tool to insert glyphs	字形を挿入するには、テキストを選択するか、文字ツールでテキスト内をクリックしてください
 	Server-side (.map)	サーバーサイド (.map)
 	Set 1	セット 1
@@ -2961,3 +2967,34 @@
 	Saved Selection 25	保存した選択範囲 25
 	Left-to-Right Paragraph Direction	左から右への段落方向
 	Right-to-Left Paragraph Direction	右から左への段落方向
+
+# About › Contributors / Models (credits.rs)
+	About	情報
+	Contributors	コントリビューター
+	Models	モデル
+	Username	ユーザー名
+	Display name	表示名
+	Real name	本名
+	Sort	並べ替え
+	Reverse the order	順序を逆にする
+	Grab bag	まとめて表示
+	Table	表
+	Name (A–Z)	名前 (A–Z)
+	Merged PRs	マージされた PR
+	Commits	コミット
+	Lines added	追加した行数
+	Lines deleted	削除した行数
+	Line delta	行数の増減
+	Binary assets added	追加したバイナリアセット
+	Binary assets removed	削除したバイナリアセット
+	First commit	最初のコミット
+	Last commit	最後のコミット
+	First	最初
+	Last	最後
+	{people} contributors · {commits} commits	コントリビューター {people} 人 · コミット {commits} 件
+	No contributor data was built into this copy.	このビルドには貢献者のデータが含まれていません。
+	No model credits were built into this copy.	このビルドにはモデルのクレジットが含まれていません。
+	Company	企業
+	Version	バージョン
+	% of all commits	全コミットに占める割合
+	Lines +/−	行数 +/−

crates/ui-egui/src/i18n/pt-br.tsv

@@ -1739,6 +1739,11 @@
 	Recent Files	Arquivos Recentes
 	Recent Font 1	Fonte Recente 1
 	Recent Font 10	Fonte Recente 10
+	Recent Font 11	Fonte Recente 11
+	Recent Font 12	Fonte Recente 12
+	Recent Font 13	Fonte Recente 13
+	Recent Font 14	Fonte Recente 14
+	Recent Font 15	Fonte Recente 15
 	Recent Font 2	Fonte Recente 2
 	Recent Font 3	Fonte Recente 3
 	Recent Font 4	Fonte Recente 4
@@ -2008,6 +2013,7 @@
 	Select Appearance Item	Selecionar Item de Aparência
 	Select Freeform Point	Selecionar Ponto Livre
 	Select Gradient Stop	Selecionar Parada de Gradiente
+	Select Guides	Selecionar Guias
 	Select Objects	Selecionar Objetos
 	Select Same Tint %	Selecionar Mesmo Tom %
 	Select Slices	Selecionar Fatias
@@ -2580,3 +2586,34 @@
 @plural	{n} star|{n} stars	{n} estrela|{n} estrelas
 @plural	{n} step|{n} steps	{n} passo|{n} passos
 @plural	{n} stroke|{n} strokes	{n} traçado|{n} traçados
+
+# About › Contributors / Models (credits.rs)
+	About	Sobre
+	Contributors	Colaboradores
+	Models	Modelos
+	Username	Nome de usuário
+	Display name	Nome de exibição
+	Real name	Nome real
+	Sort	Ordenar
+	Reverse the order	Inverter a ordem
+	Grab bag	Todos juntos
+	Table	Tabela
+	Name (A–Z)	Nome (A–Z)
+	Merged PRs	PRs mesclados
+	Commits	Commits
+	Lines added	Linhas adicionadas
+	Lines deleted	Linhas removidas
+	Line delta	Saldo de linhas
+	Binary assets added	Arquivos binários adicionados
+	Binary assets removed	Arquivos binários removidos
+	First commit	Primeiro commit
+	Last commit	Último commit
+	First	Primeiro
+	Last	Último
+	{people} contributors · {commits} commits	{people} colaboradores · {commits} commits
+	No contributor data was built into this copy.	Esta cópia foi compilada sem dados de colaboradores.
+	No model credits were built into this copy.	Esta cópia foi compilada sem créditos de modelos.
+	Company	Empresa
+	Version	Versão
+	% of all commits	% de todos os commits
+	Lines +/−	Linhas +/−

crates/ui-egui/src/i18n/zh-hans.tsv

@@ -1903,6 +1903,11 @@
 	Recent Font	最近字体
 	Recent Font 1	最近使用的字体 1
 	Recent Font 10	最近使用的字体 10
+	Recent Font 11	最近使用的字体 11
+	Recent Font 12	最近使用的字体 12
+	Recent Font 13	最近使用的字体 13
+	Recent Font 14	最近使用的字体 14
+	Recent Font 15	最近使用的字体 15
 	Recent Font 2	最近使用的字体 2
 	Recent Font 3	最近使用的字体 3
 	Recent Font 4	最近使用的字体 4
@@ -3184,6 +3189,7 @@
 	Release to Layers (Build)	释放到图层 (累积)
 	Release to Layers (Sequence)	释放到图层 (顺序)
 	Select Art	选择图稿
+	Select Guides	选择参考线
 	Show All Layers	显示所有图层
 	Unlock All Layers	解锁所有图层
 
@@ -3219,3 +3225,34 @@
 	Saved Selection 23	已保存的选区 23
 	Saved Selection 24	已保存的选区 24
 	Saved Selection 25	已保存的选区 25
+
+# About › Contributors / Models (credits.rs)
+	About	关于
+	Contributors	贡献者
+	Models	模型
+	Username	用户名
+	Display name	显示名称
+	Real name	真实姓名
+	Sort	排序
+	Reverse the order	反转顺序
+	Grab bag	名单
+	Table	表格
+	Name (A–Z)	名称 (A–Z)
+	Merged PRs	已合并的 PR
+	Commits	提交
+	Lines added	新增行数
+	Lines deleted	删除行数
+	Line delta	行数变化
+	Binary assets added	新增二进制资源
+	Binary assets removed	删除二进制资源
+	First commit	首次提交
+	Last commit	最近提交
+	First	首次
+	Last	最近
+	{people} contributors · {commits} commits	{people} 位贡献者 · {commits} 次提交
+	No contributor data was built into this copy.	此版本未包含贡献者数据。
+	No model credits were built into this copy.	此版本未包含模型致谢。
+	Company	公司
+	Version	版本
+	% of all commits	占全部提交的百分比
+	Lines +/−	行数 +/−

crates/ui-egui/src/i18n/zh-hant.tsv

@@ -1947,6 +1947,11 @@
 	Recent Font	最近使用的字體
 	Recent Font 1	最近使用的字體 1
 	Recent Font 10	最近使用的字體 10
+	Recent Font 11	最近使用的字體 11
+	Recent Font 12	最近使用的字體 12
+	Recent Font 13	最近使用的字體 13
+	Recent Font 14	最近使用的字體 14
+	Recent Font 15	最近使用的字體 15
 	Recent Font 2	最近使用的字體 2
 	Recent Font 3	最近使用的字體 3
 	Recent Font 4	最近使用的字體 4
@@ -2287,6 +2292,7 @@
 	Select art and use New Brush to make one.	選取圖稿，然後使用「新增筆刷」來製作。
 	Select Freeform Point	選取任意形狀點
 	Select Gradient Stop	選取漸層色標
+	Select Guides	選取參考線
 	Select Objects	選取物件
 	Select objects to see their CSS, or Generate CSS for the whole document.	選取物件以檢視其 CSS，或對整份文件「產生 CSS」。
 	Select Same Tint %	選取相同色調 %
@@ -2992,3 +2998,34 @@
 	  — {n} characters from another font	  — {n} 個字符來自其他字體
 	[Normal Character Style]	[正常字元樣式]
 	[Normal Paragraph Style]	[正常段落樣式]
+
+# About › Contributors / Models (credits.rs)
+	About	關於
+	Contributors	貢獻者
+	Models	模型
+	Username	使用者名稱
+	Display name	顯示名稱
+	Real name	真實姓名
+	Sort	排序
+	Reverse the order	反轉順序
+	Grab bag	全部列出
+	Table	表格
+	Name (A–Z)	名稱 (A–Z)
+	Merged PRs	已合併的 PR
+	Commits	提交
+	Lines added	新增行數
+	Lines deleted	刪除行數
+	Line delta	行數增減
+	Binary assets added	新增的二進位資產
+	Binary assets removed	移除的二進位資產
+	First commit	首次提交
+	Last commit	最近一次提交
+	First	首次
+	Last	最近
+	{people} contributors · {commits} commits	{people} 位貢獻者 · {commits} 次提交
+	No contributor data was built into this copy.	此版本未內建貢獻者資料。
+	No model credits were built into this copy.	此版本未內建模型致謝資料。
+	Company	公司
+	Version	版本
+	% of all commits	佔全部提交的比例
+	Lines +/−	行數 +/−

crates/ui-egui/src/lib.rs

@@ -19,6 +19,7 @@ pub mod canvas;
 pub mod chrome;
 pub mod community;
 pub mod control;
+pub mod credits;
 pub mod cursors;
 pub mod dialogs;
 pub mod dock;
@@ -422,6 +423,7 @@ impl VectorcraftApp {
             zoom: self.view().map(|v| v.zoom).unwrap_or(1.0),
             outline: self.ui.view.outline,
             smart_guides: self.ui.view.smart_guides,
+            guides: self.ui.view.guides,
             snap_to_grid: self.ui.view.snap_to_grid,
             snap_to_pixel: self.ui.view.snap_to_pixel,
             show_bbox: self.ui.view.bounding_box,
@@ -492,7 +494,7 @@ impl VectorcraftApp {
                     let r = &mut self.ui.recent_fonts;
                     r.retain(|f| f != font);
                     r.insert(0, font.to_string());
-                    r.truncate(10);
+                    r.truncate(MAX_RECENT_FONTS);
                 }
             }
         }
@@ -658,7 +660,17 @@ pub fn now_ms() -> f64 {
     }
 }
 
+/// The most fonts Type › Recent Fonts lists (Preferences › Type › Number of Recent Fonts).
+pub const MAX_RECENT_FONTS: usize = 15;
+
 impl VectorcraftApp {
+    /// Type › Recent Fonts: the fonts used last, newest first, as many as Preferences › Type ›
+    /// Number of Recent Fonts says.
+    pub fn recent_fonts(&self) -> &[String] {
+        let n = usize::try_from(self.session.prefs.recent_fonts_count).unwrap_or(MAX_RECENT_FONTS).clamp(1, MAX_RECENT_FONTS);
+        self.ui.recent_fonts.get(..n).unwrap_or(&self.ui.recent_fonts)
+    }
+
     /// The selection's bounding box, rotated with rotated objects ([`Session::transform_box`]). The
     /// canvas and the transform fields read it every frame: it is measured once per revision.
     pub fn selection_box(&mut self) -> Option<vectorcraft_doc::OrientedBox> {
@@ -787,9 +799,9 @@ impl VectorcraftApp {
         place::drop_files(self, files, target);
     }
 
-    /// Inject synthetic events (one press/release step per frame). Handlers read the modifiers
-    /// egui holds (`i.modifiers`), so a synthetic key or button holds its own for the frames it
-    /// spans (a drag's moves included); the keyboard's come back after.
+    /// Inject synthetic events (one press/release step or wheel turn per frame). Handlers read the
+    /// modifiers egui holds (`i.modifiers`), so a synthetic key, button or wheel turn holds its own
+    /// for the frames it spans (a drag's moves included); the keyboard's come back after.
     pub fn raw_input_hook(&mut self, raw: &mut egui::RawInput) {
         for e in &raw.events {
             match e {
@@ -807,7 +819,7 @@ impl VectorcraftApp {
         // Pointer events go one per frame so egui sees presses, drags and releases as real input;
         // keyboard sequences go up to the key release.
         let n = match first {
-            egui::Event::PointerMoved(_) | egui::Event::PointerButton { .. } => 1,
+            egui::Event::PointerMoved(_) | egui::Event::PointerButton { .. } | egui::Event::MouseWheel { .. } => 1,
             _ => self.synthetic.iter().position(|e| matches!(e, egui::Event::Key { pressed: false, .. })).map_or(self.synthetic.len(), |i| i + 1),
         };
         if let egui::Event::PointerMoved(p) | egui::Event::PointerButton { pos: p, .. } = first {
@@ -818,7 +830,9 @@ impl VectorcraftApp {
         let held = now
             .iter()
             .find_map(|e| match e {
-                egui::Event::Key { modifiers, .. } | egui::Event::PointerButton { modifiers, .. } => Some(*modifiers),
+                egui::Event::Key { modifiers, .. } | egui::Event::PointerButton { modifiers, .. } | egui::Event::MouseWheel { modifiers, .. } => {
+                    Some(*modifiers)
+                }
                 _ => None,
             })
             .or_else(|| match later.iter().find(|e| matches!(e, egui::Event::PointerButton { .. })) {

crates/ui-egui/src/menus.rs

@@ -124,6 +124,11 @@ pub const UI_COMMANDS: &[(&str, &str, &str, &str)] = &[
     ("type.recentFont8", "Recent Font 8", "", "{} apply the 8. most recently used font"),
     ("type.recentFont9", "Recent Font 9", "", "{} apply the 9. most recently used font"),
     ("type.recentFont10", "Recent Font 10", "", "{} apply the 10. most recently used font"),
+    ("type.recentFont11", "Recent Font 11", "", "{} apply the 11. most recently used font"),
+    ("type.recentFont12", "Recent Font 12", "", "{} apply the 12. most recently used font"),
+    ("type.recentFont13", "Recent Font 13", "", "{} apply the 13. most recently used font"),
+    ("type.recentFont14", "Recent Font 14", "", "{} apply the 14. most recently used font"),
+    ("type.recentFont15", "Recent Font 15", "", "{} apply the 15. most recently used font"),
     ("file.clearRecent", "Clear Recent Files", "", "{}"),
     ("type.findFont", "Find Font…", "", "{} open the Find Font dialog (engine: text.fonts / text.replaceFont / select.font)"),
     ("file.recentFiles", "Recent Files", "", "{} → [path…] most recent first"),
@@ -896,7 +901,7 @@ pub fn run_ui_command(app: &mut VectorcraftApp, id: &str, p: &Value) -> Option<R
         },
         id if id.starts_with("type.recentFont") => {
             let n: usize = id["type.recentFont".len()..].parse().unwrap_or(0);
-            match n.checked_sub(1).and_then(|i| app.ui.recent_fonts.get(i)).cloned() {
+            match n.checked_sub(1).and_then(|i| app.recent_fonts().get(i)).cloned() {
                 Some(font) => app.run("text.setStyle", json!({ "font": font })),
                 None => Err("no such recent font".into()),
             }
@@ -905,16 +910,29 @@ pub fn run_ui_command(app: &mut VectorcraftApp, id: &str, p: &Value) -> Option<R
         "view.artboards" => flag(&mut app.ui.view.artboards),
         "view.rulers" => flag(&mut app.ui.view.rulers),
         "view.boundingBox" => flag(&mut app.ui.view.bounding_box),
-        "view.guides" => flag(&mut app.ui.view.guides),
+        "view.guides" => {
+            let r = flag(&mut app.ui.view.guides);
+            // Hidden guides can't stay selected (selected, they are all that is).
+            if !app.ui.view.guides && app.session.active().is_some_and(|d| !d.selection.guides.is_empty()) {
+                // Deselecting a document that is open can't fail.
+                let _ = app.run("select.none", json!({}));
+            }
+            r
+        }
         "view.smartGuides" => flag(&mut app.ui.view.smart_guides),
         "view.grid" => flag(&mut app.ui.view.grid),
         "view.snapToGrid" => flag(&mut app.ui.view.snap_to_grid),
         "view.snapToPoint" => flag(&mut app.ui.view.snap_to_point),
         "view.zoomIn" | "view.zoomOut" => {
             let up = id == "view.zoomIn";
+            // Selection & Anchor Display › Zoom to Selection: the selection comes to the middle.
+            let focus = if app.session.prefs.zoom_to_selection { app.selection_box().map(|b| b.center()) } else { None };
             match app.view_mut() {
                 Some(v) => {
                     v.zoom = next_zoom(v.zoom, up);
+                    if let Some(c) = focus {
+                        v.center = c;
+                    }
                     Ok(json!({"zoom": v.zoom * 100.0}))
                 }
                 None => Err("no document".into()),
@@ -1333,7 +1351,7 @@ pub fn dynamic_label(app: &VectorcraftApp, id: &str, label: &str) -> String {
         },
         id if id.starts_with("type.recentFont") => {
             let n: usize = id["type.recentFont".len()..].parse().unwrap_or(0);
-            n.checked_sub(1).and_then(|i| app.ui.recent_fonts.get(i)).cloned().unwrap_or_else(|| "—".into())
+            n.checked_sub(1).and_then(|i| app.recent_fonts().get(i)).cloned().unwrap_or_else(|| "—".into())
         }
         id if id.starts_with("view.goto") => {
             let n: usize = id["view.goto".len()..].parse().unwrap_or(0);
@@ -1590,8 +1608,8 @@ fn saved_selection_slot(id: &str) -> Option<usize> {
     id.strip_prefix("select.recall")?.parse().ok()
 }
 
-/// Type → Recent Fonts slots.
-const RECENT_FONT_IDS: [&str; 10] = [
+/// Type → Recent Fonts slots (Preferences › Type › Number of Recent Fonts shows up to 15).
+const RECENT_FONT_IDS: [&str; crate::MAX_RECENT_FONTS] = [
     "type.recentFont1",
     "type.recentFont2",
     "type.recentFont3",
@@ -1602,6 +1620,11 @@ const RECENT_FONT_IDS: [&str; 10] = [
     "type.recentFont8",
     "type.recentFont9",
     "type.recentFont10",
+    "type.recentFont11",
+    "type.recentFont12",
+    "type.recentFont13",
+    "type.recentFont14",
+    "type.recentFont15",
 ];
 
 /// Effective shortcut of a command: the user's override (Edit → Keyboard Shortcuts) or the default.
@@ -1647,7 +1670,7 @@ pub fn enabled(app: &VectorcraftApp, id: &str) -> bool {
         id if id.starts_with("file.openRecent") => recent_slot(app, id).is_some(),
         "file.clearRecent" => !app.ui.recent_files.is_empty(),
         id if id.starts_with("type.recentFont") => {
-            id["type.recentFont".len()..].parse::<usize>().is_ok_and(|n| n >= 1 && n <= app.ui.recent_fonts.len()) && app.session.active().is_some()
+            id["type.recentFont".len()..].parse::<usize>().is_ok_and(|n| n >= 1 && n <= app.recent_fonts().len()) && app.session.active().is_some()
         }
         id if saved_selection_slot(id).is_some() => saved_selection_name(app, id).is_some(),
         id if id.starts_with("view.goto") => {
@@ -3455,6 +3478,39 @@ mod tests {
         assert_eq!(dynamic_label(&app, "view.cornerWidget", ""), "Show Corner Widget");
     }
 
+    /// Selection & Anchor Display › Zoom to Selection (#394): Zoom In and Zoom Out bring the
+    /// selection to the middle; off, they keep the view's centre.
+    #[test]
+    fn zoom_to_selection_centres_the_selection() {
+        let mut app = VectorcraftApp::new(vectorcraft_engine::Session::new(), crate::Services::default());
+        app.run("file.new", json!({"width": 400, "height": 300})).unwrap();
+        app.run("shape.rectangle", json!({"x": 10, "y": 20, "width": 40, "height": 20})).unwrap();
+        let center = |app: &VectorcraftApp| app.view().unwrap().center;
+        let start = center(&app);
+        app.run("prefs.set", json!({"key": "zoomToSelection", "value": false})).unwrap();
+        app.run("view.zoomIn", json!({})).unwrap();
+        assert_eq!(center(&app), start, "off: the view's centre stays");
+        app.run("prefs.set", json!({"key": "zoomToSelection", "value": true})).unwrap();
+        app.run("view.zoomOut", json!({})).unwrap();
+        assert_eq!(center(&app), vectorcraft_geom::Point::new(30.0, 30.0), "on: the selection's centre");
+    }
+
+    /// Preferences › Type › Number of Recent Fonts (#394): Type › Recent Fonts lists that many.
+    #[test]
+    fn number_of_recent_fonts_sets_how_many_are_listed() {
+        let mut app = VectorcraftApp::new(vectorcraft_engine::Session::new(), crate::Services::default());
+        app.run("file.new", json!({})).unwrap();
+        app.ui.recent_fonts = (1..=15).map(|i| format!("Font {i}")).collect();
+        let listed = |app: &VectorcraftApp| RECENT_FONT_IDS.iter().filter(|id| enabled(app, id)).count();
+        assert_eq!(listed(&app), 10, "10 by default");
+        for n in [15, 2] {
+            app.run("prefs.set", json!({"key": "recentFontsCount", "value": n})).unwrap();
+            assert_eq!(listed(&app), n);
+        }
+        assert_eq!(dynamic_label(&app, "type.recentFont2", "Recent Font"), "Font 2");
+        assert!(app.run("type.recentFont3", json!({})).is_err(), "past the count");
+    }
+
     #[test]
     fn recent_files_track_opens_and_saves() {
         let dir = std::env::temp_dir().join(format!("dc-recent-{}", std::process::id()));

crates/ui-egui/src/prefs_dialog.rs

@@ -77,6 +77,7 @@ struct Applied {
     brightness: Brightness,
     white_canvas: bool,
     threads: i32,
+    tool_tips: bool,
 }
 
 /// Per frame: push UI-side preferences into egui / the renderer when they change.
@@ -87,11 +88,16 @@ pub fn apply_runtime(app: &mut VectorcraftApp, ctx: &egui::Context) {
     {
         app.ui.brightness = b;
     }
-    let want = Applied { brightness: app.ui.brightness, white_canvas: p.canvas_color == "white", threads: p.render_threads };
+    let want =
+        Applied { brightness: app.ui.brightness, white_canvas: p.canvas_color == "white", threads: p.render_threads, tool_tips: p.show_tool_tips };
     let id = egui::Id::new("dc-applied-prefs");
     let prev: Option<Applied> = ctx.data(|d| d.get_temp::<Option<Applied>>(id)).flatten();
     if prev != Some(want) {
         theme::apply(ctx, want.brightness);
+        // General › Show Tool Tips: off, no button or field shows its tool tip (they never come
+        // due), whichever widget asks for one.
+        let delay = if want.tool_tips { egui::style::Interaction::default().tooltip_delay } else { f32::INFINITY };
+        ctx.global_style_mut(|s| s.interaction.tooltip_delay = delay);
         if want.white_canvas {
             let mut t = Tokens::get(ctx);
             t.pasteboard = egui::Color32::WHITE;
@@ -366,6 +372,52 @@ mod tests {
         assert_eq!(a.ui.engine_prefs["keyboardIncrement"], json!(4.0));
     }
 
+    /// General › Show Tool Tips: off, a button held under the pointer shows no tool tip; back on,
+    /// it does again (#394).
+    #[test]
+    fn show_tool_tips_off_hides_tool_tips() {
+        fn texts(s: &egui::Shape, out: &mut Vec<String>) {
+            match s {
+                egui::Shape::Text(t) => out.push(t.galley.text().to_string()),
+                egui::Shape::Vec(v) => v.iter().for_each(|s| texts(s, out)),
+                _ => {}
+            }
+        }
+        let mut a = app();
+        let ctx = egui::Context::default();
+        let mut time = 0.0;
+        // Come from elsewhere and hover the button for two seconds: did its tool tip show?
+        let mut hover = |a: &mut VectorcraftApp| {
+            let mut shown = vec![];
+            for i in 0..20 {
+                time += 0.1;
+                let events = match i {
+                    0 => vec![egui::Event::PointerGone],
+                    1 => vec![egui::Event::PointerMoved(egui::pos2(20.0, 12.0))],
+                    _ => vec![],
+                };
+                let raw = egui::RawInput {
+                    events,
+                    time: Some(time),
+                    screen_rect: Some(egui::Rect::from_min_size(egui::Pos2::ZERO, egui::vec2(400.0, 300.0))),
+                    ..Default::default()
+                };
+                let mut out = ctx.run_ui(raw, |ui| {
+                    apply_runtime(a, ui.ctx());
+                    ui.button("Button").on_hover_text("The tool tip");
+                });
+                out.textures_delta.clear();
+                out.shapes.iter().for_each(|c| texts(&c.shape, &mut shown));
+            }
+            shown.iter().any(|t| t == "The tool tip")
+        };
+        assert!(hover(&mut a), "on by default");
+        a.run("prefs.set", json!({"key": "showToolTips", "value": false})).unwrap();
+        assert!(!hover(&mut a), "off: no tool tip");
+        a.run("prefs.set", json!({"key": "showToolTips", "value": true})).unwrap();
+        assert!(hover(&mut a), "on again");
+    }
+
     #[test]
     fn dialog_ok_with_invalid_value_keeps_dialog_and_prefs() {
         let mut a = app();

crates/ui-egui/src/shortcuts.rs

@@ -386,12 +386,13 @@ pub fn handle(app: &mut VectorcraftApp, ctx: &egui::Context) {
     let arrows = [(Key::ArrowLeft, -1.0, 0.0), (Key::ArrowRight, 1.0, 0.0), (Key::ArrowUp, 0.0, -1.0), (Key::ArrowDown, 0.0, 1.0)];
     for (k, dx, dy) in arrows {
         let m = ctx.input(|i| i.modifiers);
-        if ctx.input_mut(|i| i.consume_key(m, k)) && app.session.active().is_some_and(|d| !d.selection.is_empty()) {
+        if ctx.input_mut(|i| i.consume_key(m, k)) && app.session.active().is_some_and(|d| d.selection.has_objects_or_guides()) {
             let _ = app.run("object.nudge", json!({"dx": dx, "dy": dy, "big": m.shift, "copy": m.alt}));
         }
     }
     // Delete / Backspace clear the selection.
-    if ctx.input_mut(|i| i.consume_key(Modifiers::NONE, Key::Backspace)) && app.session.active().is_some_and(|d| !d.selection.is_empty()) {
+    if ctx.input_mut(|i| i.consume_key(Modifiers::NONE, Key::Backspace)) && app.session.active().is_some_and(|d| d.selection.has_objects_or_guides())
+    {
         let _ = app.run("edit.clear", json!({}));
     }
     // Single-key tool shortcuts (no Cmd/Ctrl/Alt).

docs/contributors.md

@@ -0,0 +1,56 @@
+# Contributors in the About window
+
+**About ▸ Contributors** credits everyone who contributed to VectorCraft, and **About ▸ Models** credits
+the AI models named in `Co-Authored-By` trailers. This follows the shared craftrules standard
+[`standards/contributors.md`](https://github.com/storytold/craftrules/blob/main/standards/contributors.md);
+this page is the local copy of the decision.
+
+## Decision
+
+- Two files, both **compiled into the binary** by the UI crate's `build.rs` (nothing is read from
+  disk or the network at run time; the web build has them too):
+  - [`contributors/contributors.json`](../contributors/contributors.json): commit stats per GitHub
+    username. **Generated** by `craftrules/scripts/contributors.py`; never hand-edit.
+  - [`contributors/people.toml`](../contributors/people.toml): the names people chose for
+    themselves. **Each contributor adds only their own entry**, in their own PR.
+- Each contributor gets one line: GitHub username (always), display name (opt-in, or their synced
+  GitHub profile name), real name (only if they told us), merged PRs, commits, lines added, lines
+  deleted, binary assets added, binary assets removed, first and last commit date.
+- The list is shown as a **grab bag** (names flowing as text) or a **table**, in the same order. It
+  sorts by name, PRs, commits, lines added, lines deleted, line delta, binary assets added/removed,
+  first or last commit date. The name toggle cycles **Username → Display name → Real name**; a
+  missing name falls back to `@username`. Alphabetical sorting is case-insensitive and ignores the `@`.
+
+## In VectorCraft
+
+- The About window is `crates/ui-egui/src/dialogs/about.rs` (Help ▸ About VectorCraft). The labels are
+  translated like the rest of the UI (`tl!`, `crates/ui-egui/src/i18n`); names and numbers are data.
+
+## Credit yourself
+
+Add your entry to `contributors/people.toml` in a PR you commit yourself (every field optional):
+
+```toml
+[people.your-github-username]
+real_name = "Your Name"
+display_name = "Nickname"
+sync_github_name = true   # use the name on your public GitHub profile as display name
+```
+
+or, with craftrules checked out next to `craft-apps/`:
+
+```sh
+python3 ../../craftrules/scripts/contributors.py --add-me . --real-name "Your Name" --sync-github-name
+```
+
+Names show after the next refresh: the script checks that each entry was committed by its own
+user (or by a maintainer with a `consent_source`). Delete your entry to remove your names.
+
+## Refreshing (maintainers)
+
+```sh
+python3 ../../craftrules/scripts/contributors.py .           # regenerate + verify; needs git, Python 3.11+, gh
+python3 ../../craftrules/scripts/contributors.py --check .   # verify people.toml only
+```
+
+Commit the updated `contributors/contributors.json`. Git author names and emails are never recorded.

docs/control-protocol.md

@@ -24,6 +24,7 @@ so only enable it while you use it. Transport: `apps/vectorcraft/src/control_ser
 | `ui.tool.select` / `ui.tool.list` | `{tool}` | |
 | `ui.pointer` | `{events:[{kind: down|drag|up|move|doubleclick, x, y, space?: "doc"|"screen", mods?}]}` | drive the active tool exactly like the mouse |
 | `ui.key` / `ui.text` | `{key, shift?, alt?, cmd?}` / `{text}` | synthetic keyboard input |
+| `ui.wheel` | `{x, y, dy?, dx?, unit?: "line"\|"point", shift?, alt?, cmd?}` | a mouse wheel turn over screen point (x, y): `dy` notches up (+) or down, `dx` sideways. Over the canvas the wheel scrolls and Cmd- or Alt-wheel zooms; with the `zoomWithMouseWheel` preference the wheel zooms about the pointer, Shift-wheel scrolls up and down and Cmd-wheel (Ctrl on Windows and Linux) sideways |
 | `ui.set` | `{brightness?, panel?, rulers?, outline?, grid?, smartGuides?, boundingBox?, controlBar?}` | |
 | `ui.dialog.set` / `.confirm` / `.cancel` | `{field, value}` | fill and submit the open dialog |
 | `ui.screenshot` | `{path?}` | capture the window (PNG). Needs a presented frame: with the screen locked or the window minimized/covered it fails after ~8 s with an explanatory error |
@@ -462,7 +463,7 @@ from)}` opens too: dialog `printPreset`, the Print dialog's settings fields plus
 Export… are `print.presets.delete`, `print.presets.import` and `print.presets.export`; `ui.dialog.confirm` closes.
 Opening a `.vcprintpresets` file with `app.open` imports its presets.
 
-Modifiers on synthetic input: `ui.key`, `ui.click` and `ui.drag` take `shift`, `alt`, `ctrl` and `cmd` (Command on
+Modifiers on synthetic input: `ui.key`, `ui.click`, `ui.drag` and `ui.wheel` take `shift`, `alt`, `ctrl` and `cmd` (Command on
 macOS, Ctrl elsewhere), and the app holds them for the frames the input spans, as if the keys were down: a key's
 press, its `text` and its release; a click's press and release; a drag from the press through every move to the
 release. Every handler sees them (Shift+arrow nudges by the big increment, Alt+arrow nudges a copy, Shift-clicking a

docs/mcp.md

@@ -549,6 +549,29 @@ names must stay unique. In the desktop app the saved selections are listed at th
 (`select.recall1` … `select.recall25`). A file's saved selections are checked when it opens: past 25, blank or
 repeated names, and ids the document doesn't have are dropped.
 
+## Ruler guides
+
+Ruler guides are numbered in the order they were made. `guide.add {vertical, pos}` makes one (the x of a vertical
+guide, the y of a horizontal one, in points) → `{index}`; `guide.list` → `[{index, vertical, pos, selected}…]`.
+`guide.select {indexes: [index…], toggle?}` selects guides on their own (the art is deselected; `toggle` adds or
+removes them) → `{selected}`. `guide.move {index, pos}` puts one guide somewhere, `guide.move {dx?, dy?, copy?}`
+moves the selected ones (vertical guides by `dx`, horizontal ones by `dy`; `copy` leaves them and selects the
+moved copies), and `guide.remove {index?}` deletes one guide or the selected ones → `{count}`; each is one undo
+step. With guides selected, `edit.clear` (Delete) deletes them and `object.nudge` (the arrow keys) nudges them.
+View › Guides › Lock Guides (`view.guides.lock`) deselects them and refuses these commands until unlocked.
+
+The Selection, Direct Selection and Group Selection tools pick a guide within the selection tolerance, over the art
+(an anchor on it comes first with Direct Selection), and drag the selected guides: `mods.alt` copies them,
+`mods.shift` snaps the dragged guide to the ruler's ticks, and otherwise it snaps to whole pixels, the grid or, with
+Smart Guides, the art's edges, centres and anchors. In the desktop app a guide dropped off the canvas onto its
+ruler is deleted, and hidden guides (View › Guides › Hide Guides) can't be picked.
+
+```json
+{"name":"run_command","arguments":{"command":"guide.add","params":{"vertical":true,"pos":100}}}
+{"name":"pointer_gesture","arguments":{"tool":"selection","events":[{"kind":"down","x":100,"y":50},{"kind":"drag","x":140,"y":50},{"kind":"up","x":140,"y":50}]}}
+{"name":"run_command","arguments":{"command":"guide.list","params":{}}}
+```
+
 ## Graphic styles
 
 A graphic style holds an appearance (fills, strokes, effects) plus opacity, blend mode, isolate and knockout.
@@ -1072,6 +1095,29 @@ Effects off a 100 pt wide rectangle with a 10 pt stroke set to `width: 220` gets
 {"name":"run_command","arguments":{"command":"object.align","params":{"horizontal":"left","bounds":"preview"}}}
 ```
 
+## Selection preferences
+
+The Selection & Anchor Display and General preferences apply to `pointer_gesture` as they do to the mouse:
+
+- `selectionTolerance` (1–8 px, 3 by default): how near a click must be to a path to pick it, and to an anchor or
+  handle for Direct Selection.
+- `objectSelectionByPathOnly`: a click inside a filled path or compound path doesn't select it, one on its path does.
+- `ctrlClickSelectsBehind` (on by default): a Selection tool click with `mods: {cmd: true}` (Command on macOS, Ctrl
+  elsewhere) selects the object under the selected one there, the next such click the one under that, then the
+  topmost again. Cmd held to borrow the selection tool from another tool clicks as usual.
+- `doubleClickToIsolate` (on by default): off, a `doubleclick` on a group with the Selection tool no longer isolates it.
+- `usePreciseCursors`: the Pen, Eyedropper, Slice and Blend tools' pointers are a crosshair.
+
+```json
+{"name":"run_command","arguments":{"command":"prefs.set","params":{"key":"objectSelectionByPathOnly","value":true}}}
+{"name":"pointer_gesture","arguments":{"tool":"selection","mods":{"cmd":true},"events":[{"kind":"down","x":175,"y":125},{"kind":"up","x":175,"y":125}]}}
+```
+
+The preferences for the view need the desktop app (`vectorcraft-cli mcp --connect`): `zoomWithMouseWheel` (the
+wheel zooms about the pointer, Shift-wheel scrolls up and down, Cmd/Ctrl-wheel sideways; the control channel's
+`ui.wheel` turns the wheel), `zoomToSelection` (on: Zoom In and Zoom Out centre the selection), `showToolTips`,
+`anchorSize` (1–7), `gridColor`, `gridStyle`, `gridsInBack`, `guideColor`, `guideStyle` and `recentFontsCount`.
+
 ## Width points
 
 `stroke.widthPoint.set {id, t, left, right, index?, adjustAdjoining?}` adds a width point (side widths in points) or,