What are Hotkeys? Hotkeys are keyboard shortcuts that can perform predetermined functions. Whereas originally these functions have to be done via some indirect mechanisms, such as using a menu, typing a longer command, and/or using a pointing device, hotkeys can save you time and effort by reducing such sequences to a few keystrokes only. Therefore, it’s to your advantage to master as many as you can.

For example, in Windows, usually to undo a mistake you will have to select Undo from the Edit menu. But there’s an easier way. Instead of navigating to the Edit menu at the top left of the window, you can simply hold down the Ctrl key and press the letter Z on your keyboard.

Doing this will undo your last action. To redo an action that you had “undone”, try pressing Ctrl - Y.