diff --git a/crates/ui-egui/src/canvas.rs b/crates/ui-egui/src/canvas.rs
index d67b18b802..f2b5720190 100644
--- a/crates/ui-egui/src/canvas.rs
+++ b/crates/ui-egui/src/canvas.rs
@@ -1145,7 +1145,8 @@ fn page_tool_input(ui: &mut egui::Ui, view: &mut DocView, frame: &mut PageFrame<
         && let Some(p) = ptr.within(xf.rect)
     {
         view.cursor.claim(Layer::ToolArea, egui::CursorIcon::Crosshair);
-        if resp.clicked() {
+        // The tool's own click: nothing drawn over the page here holds the press.
+        if resp.clicked() && view.router.owner(i).is_none() {
             // Centred on the click, upright as the page is shown.
             let (vx, vy) = xf.screen_to_view(p);
             let (w, h) = kind.size();
@@ -1169,7 +1170,8 @@ fn page_tool_input(ui: &mut egui::Ui, view: &mut DocView, frame: &mut PageFrame<
         && let Some(p) = ptr.within(xf.rect)
     {
         view.cursor.claim(Layer::ToolArea, egui::CursorIcon::Crosshair);
-        if resp.clicked() {
+        // The tool's own click: nothing drawn over the page here holds the press.
+        if resp.clicked() && view.router.owner(i).is_none() {
             // Centred on the click at its natural size (the engine sizes it).
             let (vx, vy) = xf.screen_to_view(p);
             let u = info.pages[i].view_to_user(vx, vy);
diff --git a/crates/ui-egui/src/canvas/crop.rs b/crates/ui-egui/src/canvas/crop.rs
index dd88db1a19..bdd1e9e135 100644
--- a/crates/ui-egui/src/canvas/crop.rs
+++ b/crates/ui-egui/src/canvas/crop.rs
@@ -38,15 +38,18 @@ pub(crate) fn page_input(ui: &egui::Ui, input: CropPageInput<'_>) -> bool {
     if !allowed {
         return false;
     }
-    if resp.drag_started()
+    // The tool's own press, of the primary button: nothing drawn over the page here holds it.
+    if resp.drag_started_by(egui::PointerButton::Primary)
+        && view.router.owner(page).is_none()
         && let Some(o) = origin.filter(|o| xf.rect.contains(*o))
     {
         view.crop_drag = Some((page, o));
     }
     if let Some((p, start)) = view.crop_drag
         && p == page
-        && let Some(end) = pointer
     {
+        // Where the pointer is, or where it went down when it is off the window.
+        let end = pointer.unwrap_or(start);
         let end = Pos2::new(end.x.clamp(xf.rect.left(), xf.rect.right()), end.y.clamp(xf.rect.top(), xf.rect.bottom()));
         let r = Rect::from_two_pos(start, end);
         // Dim what will be cut away.
@@ -60,7 +63,7 @@ pub(crate) fn page_input(ui: &egui::Ui, input: CropPageInput<'_>) -> bool {
             painter.rect_filled(band, CornerRadius::ZERO, Color32::from_black_alpha(70));
         }
         painter.rect_stroke(r, CornerRadius::ZERO, Stroke::new(1.0, Color32::from_rgb(0x14, 0x73, 0xE6)), egui::StrokeKind::Middle);
-        if resp.drag_stopped() {
+        if resp.drag_stopped() || !ptr.primary_down {
             view.crop_drag = None;
             if r.width() >= 4.0 && r.height() >= 4.0 {
                 let (a, b) = (to_user(xf, info, page, r.left_top()), to_user(xf, info, page, r.right_bottom()));
diff --git a/crates/ui-egui/src/canvas/zoom_snap.rs b/crates/ui-egui/src/canvas/zoom_snap.rs
index 8e530ac58e..5a0dcf6733 100644
--- a/crates/ui-egui/src/canvas/zoom_snap.rs
+++ b/crates/ui-egui/src/canvas/zoom_snap.rs
@@ -19,19 +19,22 @@ pub(crate) fn page_input(ui: &egui::Ui, resp: &egui::Response, xf: &PageXform, p
     if pointer.is_some_and(|p| xf.rect.contains(p)) {
         view.cursor.claim(Layer::ToolArea, egui::CursorIcon::Crosshair);
     }
-    if resp.drag_started()
+    // The tool's own press, of the primary button: nothing drawn over the page here holds it.
+    if resp.drag_started_by(egui::PointerButton::Primary)
+        && view.router.owner(page).is_none()
         && let Some(o) = origin.filter(|o| xf.rect.contains(*o))
     {
         view.marquee = Some((page, o));
     }
     if let Some((p, start)) = view.marquee
         && p == page
-        && let Some(end) = pointer
     {
+        // Where the pointer is, or where it went down when it is off the window.
+        let end = pointer.unwrap_or(start);
         let end = Pos2::new(end.x.clamp(xf.rect.left(), xf.rect.right()), end.y.clamp(xf.rect.top(), xf.rect.bottom()));
         let r = Rect::from_two_pos(start, end);
         ui.painter().rect_stroke(r, CornerRadius::ZERO, Stroke::new(1.0, Color32::from_rgb(0x14, 0x73, 0xE6)), egui::StrokeKind::Middle);
-        if resp.drag_stopped() {
+        if resp.drag_stopped() || !ptr.primary_down {
             view.marquee = None;
             let (a, b) = (xf.screen_to_view(r.left_top()), xf.screen_to_view(r.right_bottom()));
             view.marquee_done = Some((page, r, [a.0.min(b.0), a.1.min(b.1), a.0.max(b.0), a.1.max(b.1)]));
diff --git a/crates/ui-egui/src/tools/redact_ui.rs b/crates/ui-egui/src/tools/redact_ui.rs
index e5c2ac06e5..96b544b4d0 100644
--- a/crates/ui-egui/src/tools/redact_ui.rs
+++ b/crates/ui-egui/src/tools/redact_ui.rs
@@ -256,7 +256,8 @@ pub(crate) fn page_input(cx: PageToolContext<'_>, over_text: impl Fn(Pos2) -> bo
     if !over_text(p) {
         view.cursor.claim(Layer::ToolArea, egui::CursorIcon::Crosshair);
     }
-    if resp.drag_started() {
+    // The tool's own press, of the primary button: nothing drawn over the page here holds it.
+    if resp.drag_started_by(egui::PointerButton::Primary) && view.router.owner(page).is_none() {
         let origin = ptr.origin.unwrap_or(p);
         if !over_text(origin) {
             view.redact_drag = Some((page, origin));
diff --git a/crates/ui-egui/src/tools/sign_ui.rs b/crates/ui-egui/src/tools/sign_ui.rs
index 921f9a738d..b00d07279a 100644
--- a/crates/ui-egui/src/tools/sign_ui.rs
+++ b/crates/ui-egui/src/tools/sign_ui.rs
@@ -176,20 +176,23 @@ pub(crate) fn page_input(
     if pointer.is_some_and(|p| xf.rect.contains(p)) {
         view.cursor.claim(Layer::ToolArea, egui::CursorIcon::Crosshair);
     }
-    if resp.drag_started()
+    // The tool's own press, of the primary button: nothing drawn over the page here holds it.
+    if resp.drag_started_by(egui::PointerButton::Primary)
+        && view.router.owner(page).is_none()
         && let Some(o) = origin.filter(|o| xf.rect.contains(*o))
     {
         view.sign.drag = Some((page, o));
     }
     if let Some((p, start)) = view.sign.drag
         && p == page
-        && let Some(end) = pointer
     {
+        // Where the pointer is, or where it went down when it is off the window.
+        let end = pointer.unwrap_or(start);
         let end = Pos2::new(end.x.clamp(xf.rect.left(), xf.rect.right()), end.y.clamp(xf.rect.top(), xf.rect.bottom()));
         let r = Rect::from_two_pos(start, end);
         ui.painter().rect_filled(r, CornerRadius::ZERO, Color32::from_rgba_unmultiplied(0x14, 0x73, 0xE6, 28));
         ui.painter().rect_stroke(r, CornerRadius::ZERO, Stroke::new(1.0, Color32::from_rgb(0x14, 0x73, 0xE6)), egui::StrokeKind::Middle);
-        if resp.drag_stopped() {
+        if resp.drag_stopped() || !ptr.primary_down {
             view.sign.drag = None;
             if r.width() >= 8.0 && r.height() >= 8.0 {
                 let user = |q: Pos2| {
diff --git a/crates/ui-egui/tests/it/pointer.rs b/crates/ui-egui/tests/it/pointer.rs
index fbd3d720e4..4a28943b11 100644
--- a/crates/ui-egui/tests/it/pointer.rs
+++ b/crates/ui-egui/tests/it/pointer.rs
@@ -744,6 +744,27 @@ fn escape_cancels_a_signature_rectangle() {
     assert!(s.dialog.is_none(), "and no signing dialog opens: {:?}", s.dialog);
 }
 
+/// Only the primary button draws a signature rectangle: a right-drag opens no signing dialog.
+#[test]
+fn a_right_drag_draws_no_signature_rectangle() {
+    let mut h = open(link_pdf(), "150", false);
+    h.state_mut().quick_tool = QuickTool::SignArea { certify: false };
+    h.run_steps(4);
+    let (a, b) = (at(&h, 60.0, 200.0), at(&h, 200.0, 120.0));
+    let button = |pos, pressed| egui::Event::PointerButton { pos, button: egui::PointerButton::Secondary, pressed, modifiers: egui::Modifiers::NONE };
+    h.hover_at(a);
+    h.run_steps(1);
+    h.event(button(a, true));
+    h.run_steps(1);
+    h.hover_at(b);
+    h.run_steps(2);
+    h.event(button(b, false));
+    h.run_steps(4);
+    let s = h.state();
+    assert_eq!(s.quick_tool, QuickTool::SignArea { certify: false }, "the tool stays: no rectangle was drawn");
+    assert!(s.dialog.is_none(), "and no signing dialog opens: {:?}", s.dialog);
+}
+
 /// Escape with the button down drops the press: its release places no stamp, and the next click
 /// places one.
 #[test]