Everyone makes mistakes. You type the wrong word in Word, delete a formula in Excel, or apply the wrong formatting. Instead of starting over, undo and redo shortcuts save the day. They let you roll back changes or bring them back with a single keystroke.
This guide explains the undo and redo shortcuts for Windows and Mac. It also shows how they work in Excel, Word, and other popular apps. Whether you’re a student writing essays or an accountant building spreadsheets, these shortcuts keep your work safe and your workflow faster.
Undo Shortcut Keys (Windows vs Mac)
Undo is the most-used shortcut in any program. It works almost everywhere: Microsoft Word, Excel, PowerPoint, browsers, and even design tools.
- Windows: Ctrl + Z
- Mac: Command + Z
Pressing undo steps back one action at a time. You can keep pressing until the history limit is reached.
Redo Shortcut Keys (Windows vs Mac)
Redo does the opposite. It brings back the action you just undid. This shortcut has minor differences across systems.
- Windows: Ctrl + Y (in some programs Ctrl + Shift + Z)
- Mac: Command + Shift + Z
It’s useful when you change your mind after using undo, especially in text editing or formatting.
Undo and Redo in Excel and Word
Undo and redo aren’t the same in every program.
In Excel, the undo feature works for actions such as entering numbers, editing formulas, or applying styles. But some tasks, like deleting a worksheet or saving a file, can’t be undone. Redo repeats the last undone step if possible.
In Word, undo lets you roll back typing, layout changes, and formatting edits. Redo will bring them back or repeat the last action, depending on context. For example, if you bolded text and pressed redo, it applies bold again.
How Many Steps Can You Undo?
Both Excel and Word usually allow up to 100 undo levels. The limit depends on your system memory. If you close the document or application, the undo history is cleared.
Other Ways to Undo or Redo Without Shortcuts
Not everyone prefers pressing key combinations. Some people feel more comfortable using the mouse, and Microsoft Office gives them options for that.
One standard method is clicking the Undo or Redo buttons on the Quick Access Toolbar, which sit at the top of Word and Excel by default. These buttons work the same as the shortcuts, just slower.
Another way is through the Ribbon menu. Both Word and Excel place Undo and Redo commands in the Home tab, so users can access them with a single click.
Right-click menus also offer Undo and Redo for quick fixes. Right-click in the document or spreadsheet, and you’ll see the commands listed.
While these methods take longer than keyboard shortcuts, they’re practical for people who mainly work with a mouse.
Troubleshooting Undo/Redo Problems
Sometimes undo or redo doesn’t work. Here are common issues and fixes:
- The undo button is greyed out → nothing to undo.
- Redo not available → nothing was undone.
- In Excel, some tasks (deleting sheets, saving workbooks) can’t be undone.
- Fixes: restart the program, re-enable the Quick Access Toolbar, or check if add-ins are interfering.
How to Undo and Redo in Other Apps
The same shortcuts appear in other tools:
- PowerPoint: Ctrl + Z / Ctrl + Y on Windows, Command + Z / Command + Shift + Z on Mac.
- Outlook: Undo typing in emails with the same keys.
- Google Docs: Ctrl + Z / Ctrl + Y on Windows, Command + Z / Command + Shift + Z on Mac.
- Apple Pages: Command + Z for undo, Command + Shift + Z for redo.
The consistency makes switching between apps easier.
Conclusion
Undo and redo may look simple, but they’re two of the most powerful shortcuts you’ll ever use. They cut down on stress, fix mistakes instantly, and keep your work moving in Word, Excel, or any other app.
On Windows, remember Ctrl + Z for undo and Ctrl + Y (sometimes Ctrl + Shift + Z) for redo. On a Mac, it’s Command + Z for undo and Command + Shift + Z for redo.
Keep these key combos in mind and you’ll save time across documents, spreadsheets, and even presentations. They’re quick, reliable, and built into nearly every program.
Got a favorite keyboard trick of your own? Share it in the comments and pass this guide along to someone who could use a shortcut boost.