Increase the number of Undo levels in Excel

Unlike in previous versions, number of Undo levels in Excel 2010 is 100 - the biggest number that can be used.

You can decrease this number, if it's necessary. To change the number of Undo levels, follow these steps:

    1.    Launch Registry Editor:

Run programs Windows 7

    2.    In the Registry Editor, navigate to the HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Excel\Options subkey:

    3.    Right-click in the right pane and choose New -> DWORD (32-bit) Value:

New in the Registry Editor

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

    6.    In the Value Data text box, enter the number of Undo levels you want-anywhere from 0 to 100.

    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.

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