It’s for those “Oh, Crikey!” moments. Those moments when you accidentally delete an important paragraph, or even your entire document’s content. When you replace a sentence and want to go back to the previous one. When you accidentally move a file, or a bunch of files somewhere they shouldn’t be, including the trash.
For Windows users, hold the CTRL button down and press the letter Z.
For Mac users, hold the Command buttons down and press the letter Z.
Undo your most recent move. Let life return to normal. Breathe a sigh of relief.