Increase the number of Undo levels in Excel
To change the number of Undo levels, follow these steps:
1. Launch Registry Editor.
2. In the Registry Editor, navigate to the
HKEY_CURRENT_USER\
3. Right-click in the right pane and choose New -> DWORD (32-bit) Value:
![New in the Registry Editor Windows 10 New in the Registry Editor Windows 10](/images/tips/150_2016/1.png)
Registry Editor creates the new value with a name such as New Value #1 and selects this name for editing.
4. Type the name UndoHistory over the default name and press Enter to apply the name.
5. Press Enter to display the Edit DWORD (32-bit) Value dialog box:
![Edit DWORD (32-bit) Value Windows 10 Edit DWORD (32-bit) Value Windows 10](/images/tips/150_2016/2.png)
6. In the Value Data text box, enter the number of Undo levels you want-anywhere from 0 to 100, hexadecimal base (256 actions - the biggest number, decimal base).
7. Click the OK button to close the Edit DWORD (32-bit) Value dialog box.
8. Choose File -> Exit to close Registry Editor.
9. Close Excel if it's running, and then restart it to make the changes take effect.
See also this tip in French: Comment augmenter le nombre de niveaux Annuler dans Excel.