Can I use my 2010 iMac as a display for my 2011 MBP? My Belkin Mini DisplayPort to MiniDisplayPort cable has just arrived. I have the laptop plugged into the iMac. Everything is arranged the way I need it, except for one thing.

How can I cycle between using my actual iMac and the MBP? Sort of like expose to shift between desktops?
Have you tried:
Cmd + F2

I've connected my MacBook Air with my iMac, and it just works fine.

But you have no change to see the two devices at the same time.