There’s a lot to explore in macOS — from file sharing to keyboard remapping — so you’d be forgiven for not having discovered every single feature that Apple’s desktop operating system has to offer. One of the most useful and yet less well known features is something Apple calls hot corners.
Like keyboard shortcuts, hot corners can help you do more in less time on your Mac. The idea is that certain actions are triggered when you move the pointer into one of the corners of the display. Better yet, you’re able to configure these actions so that they correspond to the jobs you’re doing most often on macOS.
You can, for example, quickly create a new note in Apple Notes, or launch the system screen saver, or open up Mission Control. You don’t have to enable all four corners at the same time, either — you can pick and choose which ones are active at any time.
To pick a function for each corner of the display or to disable particular hot corners:
You can add any modifier key (Command, Shift, Option, or Control) or modifier key combination to a hot corner. The modifier key options make hot corners a bit more of a deliberate action and reduce the chance of you accidentally activating a hot corner just because the pointer is in a corner of the display.