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Quick Tip: Enable Hot Corners on OS X

In the Desktop & Screen Saver System Preference pane on OS X live a bit of functionality named Hot Corners.

Hot Corners

Hot Corners are basically shortcuts for your mouse. When set up, moving the cursor to a corner of the screen can trigger any number of actions:

Hot Corner options

When triggered, the action is almost immediate, so some of them (like opening Launchpad) may be surprising until you become used to it.

To slow the process down a bit — or to keep from accidentally firing actions off all the time — modifier keys can be held down while selecting an action:

Hot Corner - modifer keys

In this example, the screensaver will only start when the cursor is moved to the upper-right corner of the display while both the Shift and Command key are pressed.