Shortcut for Undo and Redo For Windows or Linux PC, simply press the Ctrl and Z keys together to undo and the Ctrl and Y keys to redo, respectively. If you are a Mac user, then press the Cmd + Z to undo and Command + Shift + Z to redo over any document or Excel sheet. Why Use the Redo Undo Keyboard Shortcut ? Using the shortcut keys for redo and undo ensures a smooth flow of work. You are able to fix your mistakes and type quickly without using the backspace button on your documents. Undo and ... Undo an action To undo an action press Ctrl+Z on your keyboard, or select Undo on the Quick Access Toolbar. You can press Undo (or Ctrl+Z) repeatedly if you want to undo multiple steps. The redo shortcut key stands as one of the most helpful keyboard shortcuts because it enables users to undo previous undo operations. Every computer user can benefit from learning this shortcut because it makes their work more efficient and provides better application usage. Press the undo button or press ctrl + z on your keyboard. The redo button is beside undo while its shortcut is ctrl + y. Read more here.