I just bought the latest wireless mac keyboard, for my imac. On my old wired keyboard, F3 would be for expose or spaces whatever it is called were all your screens appear in boxes. And F7 - F12 would be to do with pause higher or lower volume rewind fast forward etc etc but now they are for expose and spaces! I looked on system preferences on keyboard shortucts and unchecked the box and still the functions I'd usually have still don't work. I need to change this as I cant keep using my mac remote instead. Also does anyone know how to enable a scroll function on the new magic mouse?