I have an awesome feature on my MacBook Pro. If I point my cursor to the top left of my screen the screen goes to expose view. My friend has the same computer but his does not have this feature. I was wondering how to toggle this on and off, I checked system preferences on his computer in track pad, expose and spaces but could not find anything. I even checked system preferences on my computer and could not find how to toggle this feature off. Does anyone know how to turn this on and off on the MacBook Pro???