Set Up Hot Corners to Run Mission Control Easily
As discussed in Chapter 3, Mission Control lets you see all your open windows and pick the one you need.
To run Mission Control quickly with the mouse, set up a hot corner, a screen corner that automatically triggers Mission Control when you position the mouse pointer there. You can also set up hot corners for starting and stopping the screen saver or putting the display to sleep.
Set Up Hot Corners to Run Mission Control Easily
Set Up a Hot Corner
Click 
.
The Apple menu opens.
Click System Preferences ...
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