diff --git a/src/devkit/FakeControllers.tsx b/src/devkit/FakeControllers.tsx
index 00aca17..aca4fbb 100644
--- a/src/devkit/FakeControllers.tsx
+++ b/src/devkit/FakeControllers.tsx
@@ -72,6 +72,12 @@ export function FakeControllers() {
         fakeInput.right.gripWorld.makeTranslation(0.25, 1.2, -0.5);
         force((n) => n + 1);
         return;
+      } else if (k === 'l' || k === 'L') {
+        const s = useModelStore.getState();
+        const next = !s.isLocked;
+        s.setLocked(next);
+        console.log(`[lock] ${next ? 'ON' : 'OFF'} (keyboard)`);
+        return;
       }
       apply();
     };