Undo is a function performed to reverse the action of an earlier action. For example, you may mistakenly delete text in a word processor, but can use the undo function to undo that deletion. Some software programs may also have the capability of performing multiple undo's.

Cut copy and undo

In the above picture is an example of how undo is similar to an eraser in the real world. Like an eraser, if you were to write or draw something and made a mistake you could erase (undo) the mistake.

Note: If you make changes and then close the document or program any changes that were made earlier cannot be undone.

What is the keyboard shortcut for undo?

Below is a listing of keyboard shortcuts for how you can undo on different operating systems.

  • PC desktop and laptop = Ctrl + Z
  • Apple desktop and laptop = Cmd + Z
  • Google Chromebook = Ctrl + Z

Tip: Many programs support pressing the above keys multiple times for multiple undo's. In the case of Adobe Photoshop and other programs, you may need to add additional keys to perform a multiple undo. For example, in Adobe Photoshop you press Ctrl + Alt + Z to perform multiple undo's.

Tip: The shortcut key to redo an undo is usually Ctrl + Y or Cmd + Y.

Practice undoing a cut

Practice an undo by highlighting some or all of the below text and pressing Ctrl + X to cut the text. Once the text has been cut, press Ctrl + Z to undo. Apple computer users should substitute "Ctrl" for "Cmd" (Command).

How to undo on a phone

On Apple iPhones you can shake your phone to activate the undo feature in a text program. Unfortunately, without installing an app on Android phones there is no way to undo on a Google Android phone. However, you can install the Inputting+ app to give your apps the ability to undo.

Also see: Redo, Revert, Undelete