Numbering & Section Options opens as New Section on a page without one, as InDesign's

Chris Nielsen's "Numbering Page Sections" (4:43): with page 3 selected,
the Pages panel menu's Numbering & Section Options opens InDesign's New
Section window: Start Section checked, Automatic Page Numbering chosen
and 1 offered in Start Page Numbering at, which stays editable. The window
here was titled Numbering & Section Options, Start Section was off and
the field showed the page's current number, greyed out.

- Opened on a page that doesn't start a section, the window is New
  Section: Start Section on and 1 offered; on a section's first page it
  is Numbering & Section Options, as before.
- Start Page Numbering at and Start Chapter Numbering at stay editable;
  typing a number chooses that option.
- "New Section" translated.

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

ROADMAP.md

@@ -129,6 +129,7 @@ list) · [roadmap.md](docs/roadmap.md) (milestones, plan) · [parity-checklist.m
 
 Newest first.
 
+- **2026-10-14** · Numbering & Section Options opened on a page that doesn't start a section is New Section, as in InDesign: Start Section on, 1 offered, and the start numbers stay editable (typing one chooses it). No readiness percentage change.
 - **2026-10-12** · macOS Dock Quit uses the same unsaved-document prompts as window and menu Quit. Repeated requests keep the current answers; Cancel retains every tab and unsaved recovery checkpoint, and completed Save/Don't Save answers exit through the ordinary event loop. No readiness percentage change.
 - **2026-10-12** · Orderly native exit writes the latest recovery state after finalizing current quit approvals; incomplete or stale plans keep their documents, and Undo to the saved state clears stale recovery. Unavailable or failed recovery is reported. Cancelable macOS Dock Quit remains open (#544). No readiness percentage change.
 - **2026-10-12** · Recovered documents keep a checkpoint until saved, closed or reverted, including a second crash before autosave. Restarted document IDs and explicit recovery folders preserve other snapshots; failed republishing retains the original. No readiness percentage change.

crates/ui-egui/src/dialogs.rs

@@ -1130,6 +1130,8 @@ pub fn show(app: &mut DesignApp, ctx: &egui::Context) {
         "insertTable" => crate::i18n::tr(&app.ui.language, "Create Table"),
         "textFrameOptions" => crate::i18n::tr(&app.ui.language, "Text Frame Options"),
         "documentSetup" => crate::i18n::tr(&app.ui.language, "Document Setup"),
+        // On a page that doesn't start a section yet, InDesign titles it New Section.
+        "numberingSection" if d.b("newSection") => crate::i18n::tr(&app.ui.language, "New Section"),
         "numberingSection" => crate::i18n::tr(&app.ui.language, "Numbering & Section Options…").trim_end_matches('…'),
         "findChange" => crate::i18n::tr(&app.ui.language, "Find/Change"),
         "paragraphStyleOptions" => crate::i18n::tr(&app.ui.language, "Paragraph Style Options"),
@@ -4156,6 +4158,54 @@ mod tests {
         }
     }
 
+    #[test]
+    fn on_a_page_without_a_section_the_window_is_new_section() {
+        // Chris Nielsen's "Numbering Page Sections" (4:43): page 3 selected, the Pages panel menu's
+        // Numbering & Section Options opens New Section with Start Section on and 1 offered.
+        let mut app = DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());
+        app.run("file.new", json!({"pages": 6, "facingPages": true})).unwrap();
+        app.canvas_rect = Some(egui::Rect::from_min_size(egui::Pos2::ZERO, egui::vec2(1000.0, 800.0)));
+        crate::canvas::go_to_page(&mut app, 2);
+        crate::menus::activate(&mut app, "layout.section", &Value::Null);
+        let d = app.ui.dialog.as_ref().unwrap();
+        assert_eq!(
+            (d.n("page"), d.b("newSection"), d.b("startSection"), d.b("automatic"), d.s("startNumber")),
+            (Some(3.0), true, true, true, "1".into())
+        );
+        let ctx = dialog_context("en");
+        let screen = egui::Rect::from_min_size(egui::Pos2::ZERO, egui::vec2(1178.0, 814.0));
+        for _ in 0..3 {
+            dialog_frame(&mut app, &ctx, screen, vec![]);
+        }
+        let labels = dialog_frame(&mut app, &ctx, screen, vec![]);
+        visible_label(&labels, screen, "New Section");
+        // Typing a number in the field chooses Start Page Numbering at; OK: page 3 is page 2.
+        let field = visible_label(&labels, screen, "1");
+        click_dialog(&mut app, &ctx, screen, field.center());
+        dialog_frame(
+            &mut app,
+            &ctx,
+            screen,
+            vec![
+                egui::Event::Key { key: egui::Key::End, physical_key: None, pressed: true, repeat: false, modifiers: egui::Modifiers::NONE },
+                egui::Event::Key { key: egui::Key::Backspace, physical_key: None, pressed: true, repeat: false, modifiers: egui::Modifiers::NONE },
+                egui::Event::Text("2".into()),
+            ],
+        );
+        assert!(!app.ui.dialog.as_ref().unwrap().b("automatic"), "typing chose Start Page Numbering at");
+        let labels = dialog_frame(&mut app, &ctx, screen, vec![]);
+        click_dialog(&mut app, &ctx, screen, visible_label(&labels, screen, "OK").center());
+        assert!(app.ui.dialog.is_none());
+        assert_eq!(app.session.active().unwrap().doc.page_name(2), "2");
+        // Opened again on that page, it is Numbering & Section Options, showing the section.
+        crate::menus::activate(&mut app, "layout.section", &Value::Null);
+        let d = app.ui.dialog.as_ref().unwrap();
+        assert_eq!((d.b("newSection"), d.b("startSection"), d.b("automatic"), d.s("startNumber")), (false, true, false, "2".into()));
+        let labels = (0..4).map(|_| dialog_frame(&mut app, &ctx, screen, vec![])).last().unwrap();
+        visible_label(&labels, screen, "Numbering & Section Options");
+        assert!(!labels.iter().any(|(t, _, _)| t == "New Section"));
+    }
+
     #[test]
     fn preferences_sidebar_scroll_keeps_selected_options_visible() {
         let mut app = DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());

crates/ui-egui/src/i18n.rs

@@ -55,6 +55,7 @@ const TABLE: &[(&str, [&str; 5])] = &[
     ("Cut", ["Ausschneiden", "Couper", "Cortar", "カット", "剪切"]),
     ("Copy", ["Kopieren", "Copier", "Copiar", "コピー", "复制"]),
     ("Paste", ["Einfügen", "Coller", "Pegar", "ペースト", "粘贴"]),
+    ("New Section", ["Neuer Abschnitt", "Nouvelle section", "Nueva sección", "新規セクション", "新建章节"]),
     ("Reverse Path", ["Pfadrichtung umkehren", "Inverser le tracé", "Invertir trazado", "パスの方向反転", "反转路径"]),
     ("Set Anchor", ["Ankerpunkt festlegen", "Définir le point d’ancrage", "Definir punto de ancla", "アンカーポイントを設定", "设置锚点"]),
     ("Clear", ["Löschen", "Effacer", "Borrar", "消去", "清除"]),

crates/ui-egui/src/i18n/ar.rs

@@ -30,6 +30,7 @@ pub(super) const TABLE: &[(&str, &str)] = &[
     ("Cut", "قص"),
     ("Copy", "نسخ"),
     ("Paste", "لصق"),
+    ("New Section", "قسم جديد"),
     ("Reverse Path", "عكس المسار"),
     ("Set Anchor", "تعيين نقطة الارتساء"),
     ("Clear", "مسح"),

crates/ui-egui/src/i18n/it.rs

@@ -28,6 +28,7 @@ pub(super) const TABLE: &[(&str, &str)] = &[
     ("Cut", "Taglia"),
     ("Copy", "Copia"),
     ("Paste", "Incolla"),
+    ("New Section", "Nuova sezione"),
     ("Reverse Path", "Inverti tracciato"),
     ("Set Anchor", "Imposta ancoraggio"),
     ("Clear", "Cancella"),

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

@@ -30,6 +30,7 @@ pub(super) const TABLE: &[(&str, &str)] = &[
     ("Cut", "カット"),
     ("Copy", "コピー"),
     ("Paste", "ペースト"),
+    ("New Section", "新規セクション"),
     ("Reverse Path", "パスの方向反転"),
     ("Set Anchor", "アンカーポイントを設定"),
     ("Clear", "消去"),

crates/ui-egui/src/i18n/pt_br.rs

@@ -31,6 +31,7 @@ pub(super) const TABLE: &[(&str, &str)] = &[
     ("Cut", "Recortar"),
     ("Copy", "Copiar"),
     ("Paste", "Colar"),
+    ("New Section", "Nova seção"),
     ("Reverse Path", "Inverter demarcador"),
     ("Set Anchor", "Definir ponto de ancoragem"),
     ("Clear", "Limpar"),

crates/ui-egui/src/i18n/uk.rs

@@ -31,6 +31,7 @@ pub(super) const TABLE: &[(&str, &str)] = &[
     ("Cut", "Вирізати"),
     ("Copy", "Копіювати"),
     ("Paste", "Вставити"),
+    ("New Section", "Новий розділ"),
     ("Reverse Path", "Розвернути контур"),
     ("Set Anchor", "Задати прив’язку"),
     ("Clear", "Очистити"),

crates/ui-egui/src/section_options.rs

@@ -36,13 +36,17 @@ pub(crate) fn open(app: &mut DesignApp) {
     let doc = &st.doc;
     let page = current.min(doc.page_count().saturating_sub(1));
     let own = doc.sections.iter().find(|s| s.start == page);
-    // A new section starts from the one the page is in.
+    // A new section starts from the one the page is in. As in InDesign, the window opened on a
+    // page that doesn't start a section is New Section: Start Section checked, Start Page
+    // Numbering at offering 1, Automatic Page Numbering chosen.
     let base = own.or_else(|| doc.section_of(page));
+    let new = page != 0 && own.is_none();
     let fields = json!({
         "page": page + 1,
-        "startSection": page == 0 || own.is_some(),
+        "newSection": new,
+        "startSection": true,
         "automatic": own.is_none_or(|s| s.start_number.is_none()),
-        "startNumber": doc.page_number(page).to_string(),
+        "startNumber": if new { "1".to_string() } else { doc.page_number(page).to_string() },
         "prefix": base.map(|s| s.prefix.clone()).unwrap_or_default(),
         "style": base.map(|s| s.style).unwrap_or_default(),
         "marker": base.map(|s| s.marker.clone()).unwrap_or_default(),
@@ -160,7 +164,12 @@ pub(crate) fn body(app: &DesignApp, ui: &mut Ui, d: &mut Dialog) {
                 if ui.radio(!automatic, crate::rtl::widget(ui, tr("Start Page Numbering at:"))).clicked() {
                     d.fields.insert("automatic".into(), json!(false));
                 }
-                ui.add_enabled_ui(!automatic, |ui| text(ui, d, "startNumber", FIELD_W));
+                // As in InDesign, the number stays editable; typing one chooses Start Page Numbering at.
+                let mut n = d.s("startNumber");
+                if ui.add(egui::TextEdit::singleline(&mut n).desired_width(FIELD_W)).changed() {
+                    d.fields.insert("startNumber".into(), Value::String(n));
+                    d.fields.insert("automatic".into(), json!(false));
+                }
             });
             ui.add_space(4.0);
             group(ui, rtl, tr("Page Numbering"), |ui| {
@@ -200,7 +209,12 @@ pub(crate) fn body(app: &DesignApp, ui: &mut Ui, d: &mut Dialog) {
                     }
                 });
                 if value == ChapterSource::UserDefined {
-                    ui.add_enabled_ui(source == value, |ui| text(ui, d, "chapterStart", FIELD_W));
+                    // Editable whichever is chosen, as in InDesign; typing a number chooses it.
+                    let mut n = d.s("chapterStart");
+                    if ui.add(egui::TextEdit::singleline(&mut n).desired_width(FIELD_W)).changed() {
+                        d.fields.insert("chapterStart".into(), Value::String(n));
+                        d.fields.insert("chapterSource".into(), json!(value));
+                    }
                 }
             });
         }