Use Hot Corners
Activate features by moving the pointer to corners of the screen
You might have heard of the Hot Corners feature in macOS (we mentioned it on page 83), but are you actually using it? Hot Corners enables you to perform a multitude of functions simply by moving your pointer to one of the corners of the desktop.
The Hot Corners feature is pretty well hidden in System Preferences, but once you know where to look, you’ll find out just how easy it is to activate.
Hot Corners can save you time in activating features such as the screen saver, Launchpad, and Mission Control.