diff --git a/crates/ui-egui/src/lib.rs b/crates/ui-egui/src/lib.rs
--- a/crates/ui-egui/src/lib.rs
+++ b/crates/ui-egui/src/lib.rs
@@ -2270,6 +2270,27 @@ mod tests {
         assert_eq!(app.ui.qat.len(), 6);
         app.run("app.qat", json!({"reset": true})).unwrap();
         assert_eq!(ids(app), ["app.home", "file.save", "app.exportDialog", "edit.undo", "edit.redo", "show.fromStart"]);
+        // Alt+1 runs position 0 (app.home) when on Windows/Linux, opening Backstage.
+        app.session.mac_keys = false;
+        assert!(!app.backstage_open());
+        assert!(crate::menus::ui_shortcut(app, egui::Key::Num1, deckcraft_engine::Mods { shift: false, alt: true, cmd: false }));
+        assert!(app.backstage_open());
+        // Disabled while Backstage is open.
+        assert!(!crate::menus::ui_shortcut(app, egui::Key::Num1, deckcraft_engine::Mods { shift: false, alt: true, cmd: false }));
+        app.close_backstage();
+        // Alt+9 is unassigned when there are only 6 items.
+        assert!(!crate::menus::ui_shortcut(app, egui::Key::Num9, deckcraft_engine::Mods { shift: false, alt: true, cmd: false }));
+        // Disabled on macOS so Option+digit types characters.
+        app.session.mac_keys = true;
+        assert!(!crate::menus::ui_shortcut(app, egui::Key::Num1, deckcraft_engine::Mods { shift: false, alt: true, cmd: false }));
+        app.session.mac_keys = false;
+        // Disabled when text is being edited.
+        let shape_id = deckcraft_model::ShapeId(app.session.active().unwrap().selection.shapes.first().map(|s| s.0).unwrap_or(0));
+        app.session.active_mut().unwrap().selection.text = Some(deckcraft_engine::TextSel { shape: shape_id, ..Default::default() });
+        assert!(!crate::menus::ui_shortcut(app, egui::Key::Num1, deckcraft_engine::Mods { shift: false, alt: true, cmd: false }));
+        app.session.active_mut().unwrap().selection.text = None;
+        // Disabled QAT items (e.g. edit.undo when stack is empty) cannot run.
+        assert!(!crate::qat::run_index(app, 3));
         // An older settings file without the toolbar gets the defaults.
         let old: UiState = serde_json::from_value(json!({"tab": "Home"})).unwrap();
         assert_eq!(old.qat.len(), 6);
diff --git a/crates/ui-egui/src/menus.rs b/crates/ui-egui/src/menus.rs
--- a/crates/ui-egui/src/menus.rs
+++ b/crates/ui-egui/src/menus.rs
@@ -72,6 +72,24 @@ pub fn ui_shortcut(app: &mut SlideApp, key: egui::Key, m: Mods) -> bool {
         }
         (F, true, false, false) => "app.find",
         (H, true, false, false) => "app.replace",
+        (Num1 | Num2 | Num3 | Num4 | Num5 | Num6 | Num7 | Num8 | Num9, false, false, true) => {
+            if app.session.mac_keys || app.backstage.is_some() || app.session.active().is_some_and(|d| d.selection.text.is_some()) {
+                return false;
+            }
+            let idx = match key {
+                Num1 => 0,
+                Num2 => 1,
+                Num3 => 2,
+                Num4 => 3,
+                Num5 => 4,
+                Num6 => 5,
+                Num7 => 6,
+                Num8 => 7,
+                Num9 => 8,
+                _ => return false,
+            };
+            return crate::qat::run_index(app, idx);
+        }
         _ => return false,
     };
     let _ = app.run(id, json!({}));
diff --git a/crates/ui-egui/src/qat.rs b/crates/ui-egui/src/qat.rs
--- a/crates/ui-egui/src/qat.rs
+++ b/crates/ui-egui/src/qat.rs
@@ -101,26 +101,45 @@ fn run(app: &mut SlideApp, q: &QatItem) {
     }
 }
 
-fn tip(q: &QatItem) -> String {
+/// Whether a Quick Access Toolbar item can be run right now.
+pub fn is_enabled(app: &SlideApp, id: &str) -> bool {
+    match id {
+        "app.home" => true,
+        "file.save" | "show.fromStart" | "review.spelling" | "app.find" => app.session.active().is_some(),
+        id => crate::ribbon::enabled(app, id),
+    }
+}
+
+/// Runs the Quick Access Toolbar item at `index` (0-based) if it exists and is enabled. Returns `true` if run.
+pub fn run_index(app: &mut SlideApp, index: usize) -> bool {
+    let Some(q) = app.ui.qat.get(index).cloned() else { return false };
+    if !is_enabled(app, &q.id) {
+        return false;
+    }
+    run(app, &q);
+    true
+}
+
+fn tip(q: &QatItem, index: usize, mac: bool) -> String {
     let sc =
         deckcraft_engine::find_command(&q.id).and_then(|c| c.shortcut).or_else(|| crate::UI_COMMANDS.iter().find(|c| c.0 == q.id).and_then(|c| c.2));
-    match sc {
-        Some(s) => format!("{} ({})", q.label, crate::ribbon::pretty_shortcut(s)),
-        None => q.label.clone(),
+    let qat_sc = if !mac && index < 9 { Some(format!("Alt+{}", index + 1)) } else { None };
+    match (sc, qat_sc) {
+        (Some(s), Some(qsc)) => format!("{} ({}, {})", q.label, crate::ribbon::pretty_shortcut(s), qsc),
+        (Some(s), None) => format!("{} ({})", q.label, crate::ribbon::pretty_shortcut(s)),
+        (None, Some(qsc)) => format!("{} ({})", q.label, qsc),
+        (None, None) => q.label.clone(),
     }
 }
 
 /// Draw the toolbar and its Customize menu into a left-to-right row of the title bar.
 pub fn show(app: &mut SlideApp, ui: &mut Ui) {
     let items = app.ui.qat.clone();
-    for q in &items {
+    let mac = app.session.mac_keys;
+    for (i, q) in items.iter().enumerate() {
         let on = q.id == "app.home" && app.backstage_open();
-        let en = match q.id.as_str() {
-            "app.home" => true,
-            "file.save" | "show.fromStart" | "review.spelling" | "app.find" => app.session.active().is_some(),
-            id => crate::ribbon::enabled(app, id),
-        };
-        let r = crate::widgets::icon_toggle(ui, q.icon(), &tip(q), en, on);
+        let en = is_enabled(app, &q.id);
+        let r = crate::widgets::icon_toggle(ui, q.icon(), &tip(q, i, mac), en, on);
         if r.clicked() {
             run(app, q);
         }