How to Customize Mission Control on Your Mac
If you have something against F9, F10, and F11 on your Mac (or other function keys you’re using for Exposé), open System Preferences, choose Mission Control, and assign alternative keys. And if you have something against keys in general, you can arrange to have the Mac do its thing by moving the cursor to one of the four so-called Hot Corners of the screen.
For example, you can make Mission Control appear by moving the cursor to one of the designated corners. To make a Hot Corner active, click the Hot Corners button inside Mission Control System Preferences.
Click any of the four Hot Corner buttons that you see upon doing so, and choose one of the pop-up options for the Hot Corner you’ve selected to summon application windows, your Desktop, Dashboard, Notification Center, or Launchpad. You can also start or disable a screen saver from a Hot Corner, or put the display to sleep from one.
You can designate your Hot Corner choices (assuming that you want to take advantage of the feature) on the Desktop & Screen Saver pane of System Preferences after selecting the Screen Saver tab and again clicking the Hot Corners button.
Take a gander at some of your other Mission Control options within System Preferences. You can select check boxes to show Dashboard as a Space, to automatically rearrange Spaces based on most recent use, to switch to a Space with open windows for a given application, and to group windows by application. And you can check a box that lets you give more than one display its own assigned Space.