I have 2 layers: Objects and Pause.
While in a game Objects layer is active and Pause layer is inactive. When I pause the game Objects layer is inactive and Pause layer is active (but still both layers are visible).
I have to do this because my game/app is about placing objects on Objects layer (by mouse-clicking) and pause menu is also controlled by mouse. If I don't lock Objects layer when I try to click button in pause menu I'm also placing an object in Objects layer.
Davioware, I hope this makes sense to You