diff --git a/crates/ui-egui/src/ribbon.rs b/crates/ui-egui/src/ribbon.rs
index 9c6d89eeb..662c87ef1 100644
--- a/crates/ui-egui/src/ribbon.rs
+++ b/crates/ui-egui/src/ribbon.rs
@@ -2452,14 +2452,25 @@ pub fn shortcut(app: &mut SheetApp, key: Key, m: Modifiers) {
         Key::Num9 => Some(("home.hideRows", json!({}))),
         Key::Num0 if shift => Some(("home.unhideColumns", json!({}))),
         Key::Num0 => Some(("home.hideColumns", json!({}))),
-        Key::Minus => {
-            app.open_dialog("deleteCells", json!({}));
-            None
-        }
-        Key::Plus | Key::Equals if shift => {
-            app.open_dialog("insertCells", json!({}));
-            None
-        }
+        // As in Excel: with whole rows or whole columns selected, Ctrl+Shift+= / Ctrl+- insert or
+        // delete them at once; any other selection asks which way to shift.
+        Key::Minus => match whole_lines(app) {
+            Some(true) => Some(("home.deleteRows", json!({}))),
+            Some(false) => Some(("home.deleteColumns", json!({}))),
+            None => {
+                app.open_dialog("deleteCells", json!({}));
+                None
+            }
+        },
+        // Insert works on one area at a time, so several areas still go through the dialog.
+        Key::Plus | Key::Equals if shift => match whole_lines(app).filter(|_| single_area(app)) {
+            Some(true) => Some(("home.insertRows", json!({}))),
+            Some(false) => Some(("home.insertColumns", json!({}))),
+            None => {
+                app.open_dialog("insertCells", json!({}));
+                None
+            }
+        },
         Key::Semicolon => {
             // Insert today's date.
             let text = app
@@ -2514,3 +2525,23 @@ mod checkbox_on_tests {
         assert!(!checkbox_on(false, true));
     }
 }
+
+/// Whether the selection is a single area.
+fn single_area(app: &SheetApp) -> bool {
+    app.session.active().is_some_and(|d| d.selection.ranges.len() == 1)
+}
+
+/// `Some(true)` when every selected area is whole rows, `Some(false)` when every one is whole
+/// columns, `None` otherwise (including the whole sheet).
+fn whole_lines(app: &SheetApp) -> Option<bool> {
+    let sel = &app.session.active()?.selection;
+    let rows = sel.ranges.iter().all(|r| r.is_full_rows() && !r.is_full_cols());
+    let cols = sel.ranges.iter().all(|r| r.is_full_cols() && !r.is_full_rows());
+    if rows {
+        Some(true)
+    } else if cols {
+        Some(false)
+    } else {
+        None
+    }
+}
diff --git a/crates/ui-egui/tests/whole_line_shortcuts.rs b/crates/ui-egui/tests/whole_line_shortcuts.rs
new file mode 100644
index 000000000..2bbcf3adf
--- /dev/null
+++ b/crates/ui-egui/tests/whole_line_shortcuts.rs
@@ -0,0 +1,65 @@
+//! Ctrl+Shift+= and Ctrl+- on whole rows or columns insert or delete them at once, as in Excel;
+//! any other selection opens the Insert or Delete dialog.
+
+use egui::{Key, Modifiers};
+use gridcraft_engine::Session;
+use gridcraft_engine::core::{CellRef, Value};
+use gridcraft_ui_egui::SheetApp;
+use serde_json::json;
+
+type Harness = egui_kittest::Harness<'static, SheetApp>;
+
+fn harness(selection: &str) -> Harness {
+    let mut session = Session::new();
+    session.new_workbook();
+    session.execute("range.setValues", json!({"range": "A1", "values": [["a1", "b1"], ["a2", "b2"], ["a3", "b3"]]})).unwrap();
+    session.execute("selection.set", json!({"range": selection})).unwrap();
+    let mut h = Harness::builder().with_size(egui::vec2(1200.0, 800.0)).build_ui_state(
+        |ui, app: &mut SheetApp| {
+            let ctx = ui.ctx().clone();
+            app.logic(&ctx);
+            app.ui(ui);
+        },
+        SheetApp::new(session, Default::default()),
+    );
+    h.run_steps(4);
+    h
+}
+
+fn value(h: &Harness, a1: &str) -> Value {
+    h.state().session.active().unwrap().wb.active().unwrap().value(CellRef::parse(a1).unwrap())
+}
+
+fn press(h: &mut Harness, key: Key, shift: bool) {
+    let modifiers = Modifiers { shift, ..Modifiers::COMMAND };
+    h.key_press_modifiers(modifiers, key);
+    h.run_steps(3);
+}
+
+#[test]
+fn whole_rows_are_inserted_and_deleted_at_once() {
+    let mut h = harness("2:2");
+    press(&mut h, Key::Equals, true);
+    assert!(h.state().dialog.is_none(), "no dialog for whole rows");
+    assert!(value(&h, "A2").is_empty(), "a row was inserted above row 2");
+    assert_eq!(value(&h, "A3"), Value::from("a2"));
+    press(&mut h, Key::Minus, false);
+    assert_eq!(value(&h, "A2"), Value::from("a2"), "and deleted again");
+}
+
+#[test]
+fn whole_columns_are_inserted_and_deleted_at_once() {
+    let mut h = harness("A:A");
+    press(&mut h, Key::Equals, true);
+    assert!(h.state().dialog.is_none(), "no dialog for whole columns");
+    assert_eq!(value(&h, "B1"), Value::from("a1"));
+    press(&mut h, Key::Minus, false);
+    assert_eq!(value(&h, "A1"), Value::from("a1"));
+}
+
+#[test]
+fn other_selections_still_ask_which_way_to_shift() {
+    let mut h = harness("A2:B2");
+    press(&mut h, Key::Minus, false);
+    assert_eq!(h.state().dialog.as_ref().map(|d| d.name().to_string()).as_deref(), Some("deleteCells"));
+}