Skip memorizing keyboard shortcuts
Simply moving the mouse into a corner of the screen is enough to instantly bring up Mission Control, put the display to sleep, or run whatever else you have assigned.
Choose corners you don't bump into by accident
An action fires the instant the cursor touches the assigned corner, so it is worth avoiding an easy-to-accidentally-trigger action, like sleep, on a corner your cursor crosses often during normal work. Requiring a modifier key on a given corner is another way to cut down on accidental triggers.
Frequently Asked Questions
Does it fire instantly even if the mouse touches the corner by accident?
Yes β the action runs the moment the cursor touches the assigned corner, so it is worth being careful about which action you assign to a corner you pass through often.
Can it require holding down a specific key?
Yes β each corner can be set to only trigger while a modifier key like Shift or Command is held down at the same time.