I don't think I'd change it to 0...

You can change the level of undo's in Excel:

xl2k and above
XL: How to Modify the Number of Undo Levels
http://support.microsoft.com/?kbid=211922

xl97
XL97: How to Modify the Number of Undo Levels
http://support.microsoft.com/?kbid=162944

sp3cialist wrote:

Is it possible to turn off the Undo function in Excel, a friend is working on
a large amount of data and it is using up some of the memory.. any ideas?

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Dave Peterson