This is my 1st time using dual monitors in OSX, so I'm not sure how to solve a simple problem. I have the monitors in extended mode, so I can have apps on both screen. The problem is I have 3 virtual desktops setup in Mission control. When I move to a different desktop on the imac, the 2nd monitor also moves to the new desktop, so I lose what ever is displayed on the 2nd monitor. I'd like to have the 2nd monitor locked down and only move between desktops on the main screen. Can somebody please help me on how to achieve this. I'm running Lion 10.7.2 by the way.