In computing, the undo command (Ctrl+Z on Windows, Apple ⌘+Z on Mac) is a command that restores the last change made to a file. The command can be used to undo the last change made to a document, or the last change made to a particular property of a document. It is a keyboard command, so it can be used even if the mouse is not available.

The undo command is available in most text editors, word processors, and other software that allows the user to make changes to a document. The undo command is also available in some software …