I have a 2010 Macbook Air running OS X Snow Leopard. The shortcut for display sleep is ctrl + shift + eject. How do I change this shortcut and reassign some other key to display sleep? I want eject to be the keyboard shortcut for display sleep. I use Bettertouchtool, which is supposed to allow reassignment of shortcut keys, but for some reason it won't allow me to assign the "eject" key to anything. EDIT: Bettertouch tool allows me to set F12 (fn + "eject") as the shortcut for display sleep - but that doesn't actually work when I do it. I don't know why.