diff --git a/crates/ui-egui/src/panels/pages.rs b/crates/ui-egui/src/panels/pages.rs
index acb05f9f4..856c53e90 100644
--- a/crates/ui-egui/src/panels/pages.rs
+++ b/crates/ui-egui/src/panels/pages.rs
@@ -779,369 +779,4 @@ pub(crate) fn drag_ghost(ui: &egui::Ui, label: &str, t: &Tokens) {
 }
 
 #[cfg(test)]
-mod tests {
-    use egui::{Event, Modifiers, PointerButton};
-    use egui_kittest::{
-        Harness,
-        kittest::{NodeT, Queryable},
-    };
-
-    use super::*;
-    use crate::test_window;
-
-    #[test]
-    fn parent_context_menu_deletes_the_clicked_id_even_with_a_shared_prefix() {
-        for vertical in [true, false] {
-            let mut app = DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());
-            app.run("file.new", json!({"pages": 2, "facingPages": false})).unwrap();
-            app.ui.pages_panel.parents_vertical = vertical;
-            let original = app.session.doc().unwrap().doc.parents[0].id;
-            let added = app.run("layout.parents.new", json!({"prefix": "A", "name": "Other"})).unwrap()["id"].as_u64().unwrap();
-            let mut h = harness(app);
-            // Target the actual parent row in either panel layout, not a menu helper.
-            h.get_by_label("A-Other").click_secondary();
-            h.run_steps(3);
-            h.get_by_label("Delete Parent").click();
-            h.run_steps(3);
-            let doc = &h.state().session.doc().unwrap().doc;
-            assert_eq!(doc.parents.len(), 1);
-            assert_eq!(doc.parents[0].id, original);
-            assert!(doc.parents.iter().all(|p| p.id.0 != added));
-            assert_eq!(doc.page_count(), 2, "document pages are not deleted");
-            h.state_mut().run("edit.undo", json!({})).unwrap();
-            assert_eq!(h.state().session.doc().unwrap().doc.parents.len(), 2);
-        }
-    }
-
-    #[test]
-    fn double_clicking_a_parent_shows_that_parent() {
-        let mut app = crate::DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());
-        app.run("file.new", json!({})).unwrap();
-        for prefix in ["B", "C", "D"] {
-            app.run("layout.parents.new", json!({"prefix": prefix})).unwrap();
-        }
-        app.ui.dock_tab = "pages".into();
-        let mut h = test_window::open(app, vec2(1400.0, 900.0));
-        let names = ["A-Parent", "B-Parent", "C-Parent", "D-Parent"];
-        for name in names {
-            assert_ne!(h.get_by_label(name).accesskit_node().toggled(), Some(egui::accesskit::Toggled::True), "{name} is not selected yet");
-        }
-        // Both clicks in one frame: the harness's event queue spaces events too far apart for a
-        // double click.
-        let at = h.get_by_label("C-Parent").rect().center();
-        h.input_mut().events.push(Event::PointerMoved(at));
-        for pressed in [true, false, true, false] {
-            h.input_mut().events.push(Event::PointerButton { pos: at, button: PointerButton::Primary, pressed, modifiers: Modifiers::NONE });
-        }
-        h.run_steps(4);
-        let app = &h.state().app;
-        assert!(app.session.active().unwrap().editing_parents);
-        let st = app.session.active().unwrap();
-        let layout = designcraft_tools::CanvasLayout::new(&st.doc, true);
-        let slot = crate::canvas::current_slot(app, &layout).unwrap();
-        assert_eq!(layout.slots[slot].spread, designcraft_doc::SpreadRef::Parent(2));
-        for name in names {
-            assert_eq!(h.get_by_label(name).accesskit_node().toggled() == Some(egui::accesskit::Toggled::True), name == "C-Parent", "{name}");
-        }
-        // Parent rows show a rendered thumbnail.
-        let id = st.doc.parents[2].id;
-        let rev = (st.uid, st.revision);
-        let thumbs = super::THUMBS.lock().unwrap();
-        assert!(thumbs.as_ref().unwrap().keys().any(|k| (k.0, k.1) == rev && k.2 == super::ThumbOf::Parent(id)));
-    }
-
-    fn harness(app: DesignApp) -> Harness<'static, DesignApp> {
-        sized_harness(app, vec2(280.0, 520.0))
-    }
-
-    fn sized_harness(app: DesignApp, size: egui::Vec2) -> Harness<'static, DesignApp> {
-        let mut h = Harness::builder().with_size(size).build_ui_state(
-            |ui, app: &mut DesignApp| {
-                let key = egui::Id::unique("test_fonts");
-                if ui.data(|d| d.get_temp::<bool>(key)).is_none() {
-                    crate::theme::install_fonts(ui.ctx(), "");
-                    ui.data_mut(|d| d.insert_temp(key, true));
-                    return;
-                }
-                show(app, ui);
-            },
-            app,
-        );
-        h.run_steps(3);
-        h
-    }
-
-    /// Release a dragged page over `at`.
-    fn drop_page(h: &mut Harness<'_, DesignApp>, page: usize, at: egui::Pos2, alt: bool) {
-        let modifiers = egui::Modifiers { alt, ..Default::default() };
-        h.event(egui::Event::PointerButton { pos: at, button: egui::PointerButton::Primary, pressed: true, modifiers });
-        egui::DragAndDrop::set_payload(&h.ctx, PageDrag::Page(page));
-        h.event(egui::Event::PointerMoved(at));
-        h.run_steps(2);
-        h.event(egui::Event::PointerButton { pos: at, button: egui::PointerButton::Primary, pressed: false, modifiers });
-        h.run_steps(3);
-    }
-
-    /// The page menu for page `abs` of spread `si`.
-    fn menu_harness(app: DesignApp, abs: usize, si: usize) -> Harness<'static, DesignApp> {
-        let mut h = Harness::builder().with_size(vec2(320.0, 600.0)).build_ui_state(
-            move |ui, app: &mut DesignApp| {
-                let key = egui::Id::unique("test_fonts");
-                if ui.data(|d| d.get_temp::<bool>(key)).is_none() {
-                    crate::theme::install_fonts(ui.ctx(), "");
-                    ui.data_mut(|d| d.insert_temp(key, true));
-                    return;
-                }
-                let doc = app.session.doc().unwrap().doc.clone();
-                page_menu(app, ui, &doc, abs, si);
-            },
-            app,
-        );
-        h.run_steps(3);
-        h
-    }
-
-    #[test]
-    fn a_page_in_a_spread_offers_delete_page_and_delete_spread() {
-        let mut app = DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());
-        app.run("file.new", json!({"pages": 5, "facingPages": true})).unwrap();
-        let doc = app.session.doc().unwrap().doc.clone();
-        let (si, _) = doc.page_loc(2).unwrap();
-        assert_eq!(doc.spreads[si].pages.len(), 2);
-        let mut h = menu_harness(app, 2, si);
-        let _ = h.get_by_label("Delete Spread");
-        h.get_by_label("Delete Page").click();
-        h.run_steps(3);
-        assert_eq!(h.state().session.doc().unwrap().doc.page_count(), 4, "only the clicked page");
-    }
-
-    /// As in InDesign: deleting a page with objects asks first; an empty page goes at once, and
-    /// "Don't show again" stops the question.
-    #[test]
-    fn deleting_a_page_with_objects_asks_first() {
-        let mut app = DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());
-        app.run("file.new", json!({"pages": 5, "facingPages": true})).unwrap();
-        let doc = app.session.doc().unwrap().doc.clone();
-        let (si, pi) = doc.page_loc(2).unwrap();
-        let x = doc.spreads[si].pages[pi].x;
-        app.run("frame.create", json!({"spread": si, "rect": [x + 36.0, 36.0, x + 200.0, 200.0]})).unwrap();
-        let count = |h: &Harness<'_, DesignApp>| h.state().session.doc().unwrap().doc.page_count();
-        let mut h = menu_harness(app, 2, si);
-        h.get_by_label("Delete Page").click();
-        h.run_steps(3);
-        assert_eq!(count(&h), 5, "nothing deleted yet");
-        let d = h.state().ui.dialog.clone().unwrap();
-        assert_eq!((d.id.as_str(), d.fields["pages"].clone()), ("deletePages", json!([2])));
-        // Cancel keeps the page.
-        crate::dialogs::cancel(h.state_mut());
-        assert_eq!(count(&h), 5);
-        // The whole spread: one question for both pages.
-        h.get_by_label("Delete Spread").click();
-        h.run_steps(3);
-        assert_eq!(h.state().ui.dialog.as_ref().unwrap().fields["pages"], json!([1, 2]));
-        crate::dialogs::cancel(h.state_mut());
-        // OK deletes it.
-        h.get_by_label("Delete Page").click();
-        h.run_steps(3);
-        crate::dialogs::confirm(h.state_mut()).unwrap();
-        assert_eq!(count(&h), 4);
-        assert!(!h.state().ui.skip_delete_pages_warning);
-        // An empty page goes without a question.
-        let app = h.state_mut();
-        crate::dialogs::delete_pages(app, vec![0]).unwrap();
-        assert!(app.ui.dialog.is_none());
-        assert_eq!(app.session.doc().unwrap().doc.page_count(), 3);
-        // "Don't show again".
-        let doc = app.session.doc().unwrap().doc.clone();
-        let (si, pi) = doc.page_loc(1).unwrap();
-        let x = doc.spreads[si].pages[pi].x;
-        app.run("frame.create", json!({"spread": si, "rect": [x + 36.0, 36.0, x + 200.0, 200.0]})).unwrap();
-        app.run("frame.create", json!({"spread": si, "rect": [x + 36.0, 300.0, x + 200.0, 400.0]})).unwrap();
-        crate::dialogs::delete_pages(app, vec![1]).unwrap();
-        app.ui.dialog.as_mut().unwrap().fields.insert("dontShowAgain".into(), json!(true));
-        crate::dialogs::confirm(app).unwrap();
-        assert!(app.ui.skip_delete_pages_warning);
-        assert_eq!(app.session.doc().unwrap().doc.page_count(), 2);
-        let doc = app.session.doc().unwrap().doc.clone();
-        let (si, pi) = doc.page_loc(0).unwrap();
-        let x = doc.spreads[si].pages[pi].x;
-        app.run("frame.create", json!({"spread": si, "rect": [x + 36.0, 36.0, x + 200.0, 200.0]})).unwrap();
-        crate::dialogs::delete_pages(app, vec![0]).unwrap();
-        assert!(app.ui.dialog.is_none(), "no more questions");
-        assert_eq!(app.session.doc().unwrap().doc.page_count(), 1);
-    }
-
-    /// As InDesign's: the footer stays at the bottom however many pages there are, and the
-    /// divider between parents and pages shows more or fewer parents.
-    #[test]
-    fn the_footer_stays_put_and_the_divider_resizes_the_parents() {
-        use egui::{Event, Modifiers, PointerButton};
-        let mut app = DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());
-        app.run("file.new", json!({"pages": 60, "facingPages": true})).unwrap();
-        for prefix in ["B", "C", "D", "E", "F", "G"] {
-            app.run("layout.parents.new", json!({"prefix": prefix})).unwrap();
-        }
-        app.ui.dock_tab = "pages".into();
-        let mut h = crate::test_window::open(app, vec2(1400.0, 900.0));
-        let window = egui::Rect::from_min_size(egui::Pos2::ZERO, vec2(1400.0, 900.0));
-        for label in ["60 Pages in 31 Spreads", "Create new page", "Delete selected pages"] {
-            assert!(window.contains_rect(h.get_by_label(label).rect()), "{label} is on screen");
-        }
-        // Seven parent rows: four and a half show at first; the rest scroll.
-        let divider_node = h.get_by_label("Parents and pages divider");
-        assert_eq!(divider_node.accesskit_node().role(), egui::accesskit::Role::Splitter, "the divider is a splitter, not an unknown node");
-        let divider = divider_node.rect();
-        let before = divider.center().y;
-        assert!(h.query_by_label("G-Parent").is_none_or(|n| n.rect().top() > divider.top()), "the last parent is scrolled away");
-        let (a, b) = (divider.center(), divider.center() + vec2(0.0, 80.0));
-        h.input_mut().events.push(Event::PointerMoved(a));
-        h.input_mut().events.push(Event::PointerButton { pos: a, button: PointerButton::Primary, pressed: true, modifiers: Modifiers::NONE });
-        h.step();
-        for k in 1..=4 {
-            h.input_mut().events.push(Event::PointerMoved(a + (b - a) * (k as f32 / 4.0)));
-            h.step();
-        }
-        h.input_mut().events.push(Event::PointerButton { pos: b, button: PointerButton::Primary, pressed: false, modifiers: Modifiers::NONE });
-        h.run_steps(3);
-        let after = h.get_by_label("Parents and pages divider").rect().center().y;
-        assert!(after > before + 40.0, "the divider moved down: {before} → {after}");
-        assert!(h.state().app.ui.pages_parents_height.is_some());
-        assert!(window.contains_rect(h.get_by_label("Create new page").rect()), "the footer is still there");
-    }
-
-    /// InDesign's Panel Options: thumbnail sizes, blank pages without thumbnails, parents side by
-    /// side, pages on top.
-    #[test]
-    fn panel_options_size_and_arrange_the_panel() {
-        let mut app = DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());
-        app.run("file.new", json!({"pages": 6, "facingPages": true})).unwrap();
-        app.run("layout.parents.new", json!({"prefix": "B"})).unwrap();
-        app.ui.dock_tab = "pages".into();
-        let mut h = crate::test_window::open(app, vec2(1400.0, 900.0));
-        let page = |h: &Harness<'_, crate::test_window::Window>| h.get_by_label("Page 1").rect();
-        let medium = page(&h).height();
-        // The right-click menu on the panel's empty part leads to Panel Options.
-        let empty = h.get_by_label("Create new page").rect().center() - vec2(0.0, 60.0);
-        h.input_mut().events.push(egui::Event::PointerMoved(empty));
-        for pressed in [true, false] {
-            h.input_mut().events.push(egui::Event::PointerButton {
-                pos: empty,
-                button: egui::PointerButton::Secondary,
-                pressed,
-                modifiers: egui::Modifiers::NONE,
-            });
-        }
-        h.run_steps(3);
-        h.get_by_label("Panel Options…").click();
-        h.run_steps(3);
-        let d = h.state().app.ui.dialog.clone().unwrap();
-        assert_eq!(
-            (d.id.as_str(), d.fields["pageSize"].clone(), d.fields["parentSize"].clone(), d.fields["layout"].clone()),
-            ("pagesPanelOptions", json!("medium"), json!("small"), json!("parentsOnTop"))
-        );
-        // Jumbo pages, parents side by side, pages on top.
-        let set = |h: &mut Harness<'_, crate::test_window::Window>, k: &str, v: serde_json::Value| {
-            h.state_mut().app.ui.dialog.as_mut().unwrap().fields.insert(k.into(), v);
-        };
-        set(&mut h, "pageSize", json!("jumbo"));
-        set(&mut h, "parentsVertical", json!(false));
-        set(&mut h, "layout", json!("pagesOnTop"));
-        crate::dialogs::confirm(&mut h.state_mut().app).unwrap();
-        h.run_steps(4);
-        assert!(page(&h).height() > 2.5 * medium, "Jumbo: {} vs {medium}", page(&h).height());
-        let o = &h.state().app.ui.pages_panel;
-        assert_eq!((o.page_size, o.parents_vertical, o.pages_on_top), (IconSize::Jumbo, false, true));
-        // Pages on top: the parents come after the pages; side by side: [None] and A sit in one row.
-        let (none, a) = (h.get_by_label("[None]").rect(), h.get_by_label("A-Parent").rect());
-        assert!(none.top() > page(&h).top(), "parents below the pages");
-        assert!((none.top() - a.top()).abs() < 1.0 && a.left() > none.right(), "side by side");
-        // Extra Small: no thumbnails, just pages.
-        crate::panels::pages::open_panel_options(&mut h.state_mut().app);
-        set(&mut h, "pageSize", json!("extraSmall"));
-        crate::dialogs::confirm(&mut h.state_mut().app).unwrap();
-        h.run_steps(4);
-        assert!(page(&h).height() < 0.5 * medium);
-    }
-
-    /// Panel Options' parent size sets the height of the parents' rendered thumbnails (cached per
-    /// parent and size), and Show Thumbnails off leaves them blank.
-    /// Parent rows taller than the room left for the parents (Extra Large or Jumbo in a short
-    /// panel) draw and drag without a panic.
-    #[test]
-    fn large_parent_rows_in_a_short_panel_do_not_panic() {
-        use egui::{Event, Modifiers, PointerButton};
-        for size in [IconSize::ExtraLarge, IconSize::Jumbo] {
-            let mut app = DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());
-            app.run("file.new", json!({"pages": 4})).unwrap();
-            app.ui.pages_panel.parent_size = size;
-            let mut h = sized_harness(app, vec2(260.0, 160.0));
-            let a = h.get_by_label("Parents and pages divider").rect().center();
-            h.input_mut().events.push(Event::PointerMoved(a));
-            h.input_mut().events.push(Event::PointerButton { pos: a, button: PointerButton::Primary, pressed: true, modifiers: Modifiers::NONE });
-            h.step();
-            for dy in [20.0, 40.0, -60.0] {
-                h.input_mut().events.push(Event::PointerMoved(a + vec2(0.0, dy)));
-                h.step();
-            }
-            h.input_mut().events.push(Event::PointerButton { pos: a, button: PointerButton::Primary, pressed: false, modifiers: Modifiers::NONE });
-            h.run_steps(2);
-            assert!(h.state().ui.pages_parents_height.is_some(), "{size:?}: the divider was dragged");
-        }
-    }
-
-    #[test]
-    fn parent_thumbnails_follow_panel_options() {
-        let parent_thumb_heights = |thumbnails: bool| {
-            let mut app = DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());
-            app.run("file.new", json!({})).unwrap();
-            app.ui.dock_tab = "pages".into();
-            app.ui.pages_panel.parent_size = IconSize::Large;
-            app.ui.pages_panel.parent_thumbnails = thumbnails;
-            let h = crate::test_window::open(app, vec2(1400.0, 900.0));
-            let st = h.state().app.session.active().unwrap();
-            let id = st.doc.parents[0].id;
-            let thumbs = super::THUMBS.lock().unwrap();
-            let keys = thumbs.as_ref().map(|m| m.keys().copied().collect::<Vec<_>>()).unwrap_or_default();
-            keys.into_iter().filter(|k| k.0 == st.uid && k.2 == super::ThumbOf::Parent(id)).map(|k| k.3).collect::<Vec<_>>()
-        };
-        assert_eq!(parent_thumb_heights(true), vec![IconSize::Large.row_h() as u32 - 5]);
-        assert_eq!(parent_thumb_heights(false), Vec::<u32>::new());
-    }
-
-    #[test]
-    fn the_panel_menu_follows_indesigns_order() {
-        let mut app = DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());
-        app.run("file.new", json!({"pages": 2, "facingPages": false})).unwrap();
-        let mut h = menu_harness(app, 0, 0);
-        assert!(h.query_by_label("Delete Spread").is_none(), "a single-page spread has no Delete Spread");
-        // InDesign's items, top to bottom.
-        let ys: Vec<f32> = ["Insert Pages…", "Move Pages…", "Duplicate Spread", "Duplicate Spread at End of Document", "Delete Page", "New Parent…"]
-            .iter()
-            .map(|l| h.get_by_label(l).rect().center().y)
-            .collect();
-        assert!(ys.windows(2).all(|w| w[0] < w[1]), "{ys:?}");
-        h.get_by_label("Duplicate Spread at End of Document").click();
-        h.run_steps(3);
-        assert_eq!(h.state().session.doc().unwrap().doc.page_count(), 3);
-        h.get_by_label("Insert Pages…").click();
-        h.run_steps(3);
-        assert!(h.state().ui.dialog.as_ref().is_some_and(|d| d.id == "cmd:layout.pages.insert"));
-    }
-
-    #[test]
-    fn a_page_dropped_on_create_new_page_is_duplicated_at_the_end() {
-        // Chris Cicchino's Page Tool video (2:06): "click and drag onto my plus sign I can duplicate that".
-        let mut app = DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());
-        app.run("file.new", json!({"width": 252, "height": 144, "facingPages": false})).unwrap();
-        app.run("layout.pages.insert", json!({"count": 1})).unwrap();
-        app.run("layout.pageSize", json!({"pages": [2], "width": 612, "height": 792})).unwrap();
-        let mut h = harness(app);
-        let plus = h.get_by_label("Create new page").rect().center();
-        drop_page(&mut h, 1, plus, false);
-        let d = h.state().session.doc().unwrap().doc.clone();
-        assert_eq!(d.page_count(), 3);
-        let (si, pi) = d.page_loc(2).unwrap();
-        assert_eq!(d.spreads[si].pages[pi].width, 612.0, "a copy of the letterhead");
-        let _ = h.get_by_label("Edit page size");
-    }
-}
+mod tests;
diff --git a/crates/ui-egui/src/panels/pages/tests.rs b/crates/ui-egui/src/panels/pages/tests.rs
new file mode 100644
index 000000000..e70c16f9b
--- /dev/null
+++ b/crates/ui-egui/src/panels/pages/tests.rs
@@ -0,0 +1,364 @@
+use egui::{Event, Modifiers, PointerButton};
+use egui_kittest::{
+    Harness,
+    kittest::{NodeT, Queryable},
+};
+
+use super::*;
+use crate::test_window;
+
+#[test]
+fn parent_context_menu_deletes_the_clicked_id_even_with_a_shared_prefix() {
+    for vertical in [true, false] {
+        let mut app = DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());
+        app.run("file.new", json!({"pages": 2, "facingPages": false})).unwrap();
+        app.ui.pages_panel.parents_vertical = vertical;
+        let original = app.session.doc().unwrap().doc.parents[0].id;
+        let added = app.run("layout.parents.new", json!({"prefix": "A", "name": "Other"})).unwrap()["id"].as_u64().unwrap();
+        let mut h = harness(app);
+        // Target the actual parent row in either panel layout, not a menu helper.
+        h.get_by_label("A-Other").click_secondary();
+        h.run_steps(3);
+        h.get_by_label("Delete Parent").click();
+        h.run_steps(3);
+        let doc = &h.state().session.doc().unwrap().doc;
+        assert_eq!(doc.parents.len(), 1);
+        assert_eq!(doc.parents[0].id, original);
+        assert!(doc.parents.iter().all(|p| p.id.0 != added));
+        assert_eq!(doc.page_count(), 2, "document pages are not deleted");
+        h.state_mut().run("edit.undo", json!({})).unwrap();
+        assert_eq!(h.state().session.doc().unwrap().doc.parents.len(), 2);
+    }
+}
+
+#[test]
+fn double_clicking_a_parent_shows_that_parent() {
+    let mut app = crate::DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());
+    app.run("file.new", json!({})).unwrap();
+    for prefix in ["B", "C", "D"] {
+        app.run("layout.parents.new", json!({"prefix": prefix})).unwrap();
+    }
+    app.ui.dock_tab = "pages".into();
+    let mut h = test_window::open(app, vec2(1400.0, 900.0));
+    let names = ["A-Parent", "B-Parent", "C-Parent", "D-Parent"];
+    for name in names {
+        assert_ne!(h.get_by_label(name).accesskit_node().toggled(), Some(egui::accesskit::Toggled::True), "{name} is not selected yet");
+    }
+    // Both clicks in one frame: the harness's event queue spaces events too far apart for a
+    // double click.
+    let at = h.get_by_label("C-Parent").rect().center();
+    h.input_mut().events.push(Event::PointerMoved(at));
+    for pressed in [true, false, true, false] {
+        h.input_mut().events.push(Event::PointerButton { pos: at, button: PointerButton::Primary, pressed, modifiers: Modifiers::NONE });
+    }
+    h.run_steps(4);
+    let app = &h.state().app;
+    assert!(app.session.active().unwrap().editing_parents);
+    let st = app.session.active().unwrap();
+    let layout = designcraft_tools::CanvasLayout::new(&st.doc, true);
+    let slot = crate::canvas::current_slot(app, &layout).unwrap();
+    assert_eq!(layout.slots[slot].spread, designcraft_doc::SpreadRef::Parent(2));
+    for name in names {
+        assert_eq!(h.get_by_label(name).accesskit_node().toggled() == Some(egui::accesskit::Toggled::True), name == "C-Parent", "{name}");
+    }
+    // Parent rows show a rendered thumbnail.
+    let id = st.doc.parents[2].id;
+    let rev = (st.uid, st.revision);
+    let thumbs = super::THUMBS.lock().unwrap();
+    assert!(thumbs.as_ref().unwrap().keys().any(|k| (k.0, k.1) == rev && k.2 == super::ThumbOf::Parent(id)));
+}
+
+fn harness(app: DesignApp) -> Harness<'static, DesignApp> {
+    sized_harness(app, vec2(280.0, 520.0))
+}
+
+fn sized_harness(app: DesignApp, size: egui::Vec2) -> Harness<'static, DesignApp> {
+    let mut h = Harness::builder().with_size(size).build_ui_state(
+        |ui, app: &mut DesignApp| {
+            let key = egui::Id::unique("test_fonts");
+            if ui.data(|d| d.get_temp::<bool>(key)).is_none() {
+                crate::theme::install_fonts(ui.ctx(), "");
+                ui.data_mut(|d| d.insert_temp(key, true));
+                return;
+            }
+            show(app, ui);
+        },
+        app,
+    );
+    h.run_steps(3);
+    h
+}
+
+/// Release a dragged page over `at`.
+fn drop_page(h: &mut Harness<'_, DesignApp>, page: usize, at: egui::Pos2, alt: bool) {
+    let modifiers = egui::Modifiers { alt, ..Default::default() };
+    h.event(egui::Event::PointerButton { pos: at, button: egui::PointerButton::Primary, pressed: true, modifiers });
+    egui::DragAndDrop::set_payload(&h.ctx, PageDrag::Page(page));
+    h.event(egui::Event::PointerMoved(at));
+    h.run_steps(2);
+    h.event(egui::Event::PointerButton { pos: at, button: egui::PointerButton::Primary, pressed: false, modifiers });
+    h.run_steps(3);
+}
+
+/// The page menu for page `abs` of spread `si`.
+fn menu_harness(app: DesignApp, abs: usize, si: usize) -> Harness<'static, DesignApp> {
+    let mut h = Harness::builder().with_size(vec2(320.0, 600.0)).build_ui_state(
+        move |ui, app: &mut DesignApp| {
+            let key = egui::Id::unique("test_fonts");
+            if ui.data(|d| d.get_temp::<bool>(key)).is_none() {
+                crate::theme::install_fonts(ui.ctx(), "");
+                ui.data_mut(|d| d.insert_temp(key, true));
+                return;
+            }
+            let doc = app.session.doc().unwrap().doc.clone();
+            page_menu(app, ui, &doc, abs, si);
+        },
+        app,
+    );
+    h.run_steps(3);
+    h
+}
+
+#[test]
+fn a_page_in_a_spread_offers_delete_page_and_delete_spread() {
+    let mut app = DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());
+    app.run("file.new", json!({"pages": 5, "facingPages": true})).unwrap();
+    let doc = app.session.doc().unwrap().doc.clone();
+    let (si, _) = doc.page_loc(2).unwrap();
+    assert_eq!(doc.spreads[si].pages.len(), 2);
+    let mut h = menu_harness(app, 2, si);
+    let _ = h.get_by_label("Delete Spread");
+    h.get_by_label("Delete Page").click();
+    h.run_steps(3);
+    assert_eq!(h.state().session.doc().unwrap().doc.page_count(), 4, "only the clicked page");
+}
+
+/// As in InDesign: deleting a page with objects asks first; an empty page goes at once, and
+/// "Don't show again" stops the question.
+#[test]
+fn deleting_a_page_with_objects_asks_first() {
+    let mut app = DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());
+    app.run("file.new", json!({"pages": 5, "facingPages": true})).unwrap();
+    let doc = app.session.doc().unwrap().doc.clone();
+    let (si, pi) = doc.page_loc(2).unwrap();
+    let x = doc.spreads[si].pages[pi].x;
+    app.run("frame.create", json!({"spread": si, "rect": [x + 36.0, 36.0, x + 200.0, 200.0]})).unwrap();
+    let count = |h: &Harness<'_, DesignApp>| h.state().session.doc().unwrap().doc.page_count();
+    let mut h = menu_harness(app, 2, si);
+    h.get_by_label("Delete Page").click();
+    h.run_steps(3);
+    assert_eq!(count(&h), 5, "nothing deleted yet");
+    let d = h.state().ui.dialog.clone().unwrap();
+    assert_eq!((d.id.as_str(), d.fields["pages"].clone()), ("deletePages", json!([2])));
+    // Cancel keeps the page.
+    crate::dialogs::cancel(h.state_mut());
+    assert_eq!(count(&h), 5);
+    // The whole spread: one question for both pages.
+    h.get_by_label("Delete Spread").click();
+    h.run_steps(3);
+    assert_eq!(h.state().ui.dialog.as_ref().unwrap().fields["pages"], json!([1, 2]));
+    crate::dialogs::cancel(h.state_mut());
+    // OK deletes it.
+    h.get_by_label("Delete Page").click();
+    h.run_steps(3);
+    crate::dialogs::confirm(h.state_mut()).unwrap();
+    assert_eq!(count(&h), 4);
+    assert!(!h.state().ui.skip_delete_pages_warning);
+    // An empty page goes without a question.
+    let app = h.state_mut();
+    crate::dialogs::delete_pages(app, vec![0]).unwrap();
+    assert!(app.ui.dialog.is_none());
+    assert_eq!(app.session.doc().unwrap().doc.page_count(), 3);
+    // "Don't show again".
+    let doc = app.session.doc().unwrap().doc.clone();
+    let (si, pi) = doc.page_loc(1).unwrap();
+    let x = doc.spreads[si].pages[pi].x;
+    app.run("frame.create", json!({"spread": si, "rect": [x + 36.0, 36.0, x + 200.0, 200.0]})).unwrap();
+    app.run("frame.create", json!({"spread": si, "rect": [x + 36.0, 300.0, x + 200.0, 400.0]})).unwrap();
+    crate::dialogs::delete_pages(app, vec![1]).unwrap();
+    app.ui.dialog.as_mut().unwrap().fields.insert("dontShowAgain".into(), json!(true));
+    crate::dialogs::confirm(app).unwrap();
+    assert!(app.ui.skip_delete_pages_warning);
+    assert_eq!(app.session.doc().unwrap().doc.page_count(), 2);
+    let doc = app.session.doc().unwrap().doc.clone();
+    let (si, pi) = doc.page_loc(0).unwrap();
+    let x = doc.spreads[si].pages[pi].x;
+    app.run("frame.create", json!({"spread": si, "rect": [x + 36.0, 36.0, x + 200.0, 200.0]})).unwrap();
+    crate::dialogs::delete_pages(app, vec![0]).unwrap();
+    assert!(app.ui.dialog.is_none(), "no more questions");
+    assert_eq!(app.session.doc().unwrap().doc.page_count(), 1);
+}
+
+/// As InDesign's: the footer stays at the bottom however many pages there are, and the
+/// divider between parents and pages shows more or fewer parents.
+#[test]
+fn the_footer_stays_put_and_the_divider_resizes_the_parents() {
+    use egui::{Event, Modifiers, PointerButton};
+    let mut app = DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());
+    app.run("file.new", json!({"pages": 60, "facingPages": true})).unwrap();
+    for prefix in ["B", "C", "D", "E", "F", "G"] {
+        app.run("layout.parents.new", json!({"prefix": prefix})).unwrap();
+    }
+    app.ui.dock_tab = "pages".into();
+    let mut h = crate::test_window::open(app, vec2(1400.0, 900.0));
+    let window = egui::Rect::from_min_size(egui::Pos2::ZERO, vec2(1400.0, 900.0));
+    for label in ["60 Pages in 31 Spreads", "Create new page", "Delete selected pages"] {
+        assert!(window.contains_rect(h.get_by_label(label).rect()), "{label} is on screen");
+    }
+    // Seven parent rows: four and a half show at first; the rest scroll.
+    let divider_node = h.get_by_label("Parents and pages divider");
+    assert_eq!(divider_node.accesskit_node().role(), egui::accesskit::Role::Splitter, "the divider is a splitter, not an unknown node");
+    let divider = divider_node.rect();
+    let before = divider.center().y;
+    assert!(h.query_by_label("G-Parent").is_none_or(|n| n.rect().top() > divider.top()), "the last parent is scrolled away");
+    let (a, b) = (divider.center(), divider.center() + vec2(0.0, 80.0));
+    h.input_mut().events.push(Event::PointerMoved(a));
+    h.input_mut().events.push(Event::PointerButton { pos: a, button: PointerButton::Primary, pressed: true, modifiers: Modifiers::NONE });
+    h.step();
+    for k in 1..=4 {
+        h.input_mut().events.push(Event::PointerMoved(a + (b - a) * (k as f32 / 4.0)));
+        h.step();
+    }
+    h.input_mut().events.push(Event::PointerButton { pos: b, button: PointerButton::Primary, pressed: false, modifiers: Modifiers::NONE });
+    h.run_steps(3);
+    let after = h.get_by_label("Parents and pages divider").rect().center().y;
+    assert!(after > before + 40.0, "the divider moved down: {before} → {after}");
+    assert!(h.state().app.ui.pages_parents_height.is_some());
+    assert!(window.contains_rect(h.get_by_label("Create new page").rect()), "the footer is still there");
+}
+
+/// InDesign's Panel Options: thumbnail sizes, blank pages without thumbnails, parents side by
+/// side, pages on top.
+#[test]
+fn panel_options_size_and_arrange_the_panel() {
+    let mut app = DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());
+    app.run("file.new", json!({"pages": 6, "facingPages": true})).unwrap();
+    app.run("layout.parents.new", json!({"prefix": "B"})).unwrap();
+    app.ui.dock_tab = "pages".into();
+    let mut h = crate::test_window::open(app, vec2(1400.0, 900.0));
+    let page = |h: &Harness<'_, crate::test_window::Window>| h.get_by_label("Page 1").rect();
+    let medium = page(&h).height();
+    // The right-click menu on the panel's empty part leads to Panel Options.
+    let empty = h.get_by_label("Create new page").rect().center() - vec2(0.0, 60.0);
+    h.input_mut().events.push(egui::Event::PointerMoved(empty));
+    for pressed in [true, false] {
+        h.input_mut().events.push(egui::Event::PointerButton {
+            pos: empty,
+            button: egui::PointerButton::Secondary,
+            pressed,
+            modifiers: egui::Modifiers::NONE,
+        });
+    }
+    h.run_steps(3);
+    h.get_by_label("Panel Options…").click();
+    h.run_steps(3);
+    let d = h.state().app.ui.dialog.clone().unwrap();
+    assert_eq!(
+        (d.id.as_str(), d.fields["pageSize"].clone(), d.fields["parentSize"].clone(), d.fields["layout"].clone()),
+        ("pagesPanelOptions", json!("medium"), json!("small"), json!("parentsOnTop"))
+    );
+    // Jumbo pages, parents side by side, pages on top.
+    let set = |h: &mut Harness<'_, crate::test_window::Window>, k: &str, v: serde_json::Value| {
+        h.state_mut().app.ui.dialog.as_mut().unwrap().fields.insert(k.into(), v);
+    };
+    set(&mut h, "pageSize", json!("jumbo"));
+    set(&mut h, "parentsVertical", json!(false));
+    set(&mut h, "layout", json!("pagesOnTop"));
+    crate::dialogs::confirm(&mut h.state_mut().app).unwrap();
+    h.run_steps(4);
+    assert!(page(&h).height() > 2.5 * medium, "Jumbo: {} vs {medium}", page(&h).height());
+    let o = &h.state().app.ui.pages_panel;
+    assert_eq!((o.page_size, o.parents_vertical, o.pages_on_top), (IconSize::Jumbo, false, true));
+    // Pages on top: the parents come after the pages; side by side: [None] and A sit in one row.
+    let (none, a) = (h.get_by_label("[None]").rect(), h.get_by_label("A-Parent").rect());
+    assert!(none.top() > page(&h).top(), "parents below the pages");
+    assert!((none.top() - a.top()).abs() < 1.0 && a.left() > none.right(), "side by side");
+    // Extra Small: no thumbnails, just pages.
+    crate::panels::pages::open_panel_options(&mut h.state_mut().app);
+    set(&mut h, "pageSize", json!("extraSmall"));
+    crate::dialogs::confirm(&mut h.state_mut().app).unwrap();
+    h.run_steps(4);
+    assert!(page(&h).height() < 0.5 * medium);
+}
+
+/// Panel Options' parent size sets the height of the parents' rendered thumbnails (cached per
+/// parent and size), and Show Thumbnails off leaves them blank.
+/// Parent rows taller than the room left for the parents (Extra Large or Jumbo in a short
+/// panel) draw and drag without a panic.
+#[test]
+fn large_parent_rows_in_a_short_panel_do_not_panic() {
+    use egui::{Event, Modifiers, PointerButton};
+    for size in [IconSize::ExtraLarge, IconSize::Jumbo] {
+        let mut app = DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());
+        app.run("file.new", json!({"pages": 4})).unwrap();
+        app.ui.pages_panel.parent_size = size;
+        let mut h = sized_harness(app, vec2(260.0, 160.0));
+        let a = h.get_by_label("Parents and pages divider").rect().center();
+        h.input_mut().events.push(Event::PointerMoved(a));
+        h.input_mut().events.push(Event::PointerButton { pos: a, button: PointerButton::Primary, pressed: true, modifiers: Modifiers::NONE });
+        h.step();
+        for dy in [20.0, 40.0, -60.0] {
+            h.input_mut().events.push(Event::PointerMoved(a + vec2(0.0, dy)));
+            h.step();
+        }
+        h.input_mut().events.push(Event::PointerButton { pos: a, button: PointerButton::Primary, pressed: false, modifiers: Modifiers::NONE });
+        h.run_steps(2);
+        assert!(h.state().ui.pages_parents_height.is_some(), "{size:?}: the divider was dragged");
+    }
+}
+
+#[test]
+fn parent_thumbnails_follow_panel_options() {
+    let parent_thumb_heights = |thumbnails: bool| {
+        let mut app = DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());
+        app.run("file.new", json!({})).unwrap();
+        app.ui.dock_tab = "pages".into();
+        app.ui.pages_panel.parent_size = IconSize::Large;
+        app.ui.pages_panel.parent_thumbnails = thumbnails;
+        let h = crate::test_window::open(app, vec2(1400.0, 900.0));
+        let st = h.state().app.session.active().unwrap();
+        let id = st.doc.parents[0].id;
+        let thumbs = super::THUMBS.lock().unwrap();
+        let keys = thumbs.as_ref().map(|m| m.keys().copied().collect::<Vec<_>>()).unwrap_or_default();
+        keys.into_iter().filter(|k| k.0 == st.uid && k.2 == super::ThumbOf::Parent(id)).map(|k| k.3).collect::<Vec<_>>()
+    };
+    assert_eq!(parent_thumb_heights(true), vec![IconSize::Large.row_h() as u32 - 5]);
+    assert_eq!(parent_thumb_heights(false), Vec::<u32>::new());
+}
+
+#[test]
+fn the_panel_menu_follows_indesigns_order() {
+    let mut app = DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());
+    app.run("file.new", json!({"pages": 2, "facingPages": false})).unwrap();
+    let mut h = menu_harness(app, 0, 0);
+    assert!(h.query_by_label("Delete Spread").is_none(), "a single-page spread has no Delete Spread");
+    // InDesign's items, top to bottom.
+    let ys: Vec<f32> = ["Insert Pages…", "Move Pages…", "Duplicate Spread", "Duplicate Spread at End of Document", "Delete Page", "New Parent…"]
+        .iter()
+        .map(|l| h.get_by_label(l).rect().center().y)
+        .collect();
+    assert!(ys.windows(2).all(|w| w[0] < w[1]), "{ys:?}");
+    h.get_by_label("Duplicate Spread at End of Document").click();
+    h.run_steps(3);
+    assert_eq!(h.state().session.doc().unwrap().doc.page_count(), 3);
+    h.get_by_label("Insert Pages…").click();
+    h.run_steps(3);
+    assert!(h.state().ui.dialog.as_ref().is_some_and(|d| d.id == "cmd:layout.pages.insert"));
+}
+
+#[test]
+fn a_page_dropped_on_create_new_page_is_duplicated_at_the_end() {
+    // Chris Cicchino's Page Tool video (2:06): "click and drag onto my plus sign I can duplicate that".
+    let mut app = DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());
+    app.run("file.new", json!({"width": 252, "height": 144, "facingPages": false})).unwrap();
+    app.run("layout.pages.insert", json!({"count": 1})).unwrap();
+    app.run("layout.pageSize", json!({"pages": [2], "width": 612, "height": 792})).unwrap();
+    let mut h = harness(app);
+    let plus = h.get_by_label("Create new page").rect().center();
+    drop_page(&mut h, 1, plus, false);
+    let d = h.state().session.doc().unwrap().doc.clone();
+    assert_eq!(d.page_count(), 3);
+    let (si, pi) = d.page_loc(2).unwrap();
+    assert_eq!(d.spreads[si].pages[pi].width, 612.0, "a copy of the letterhead");
+    let _ = h.get_by_label("Edit page size");
+}