Hello

If I write VBA code, run the procedure, and then want to
undo what I have just done, how do I do that?

For example, suppose I run the following procedure which
places the value 10 in cell A1 of the activeworksheet.

Sub XYZ ()
Range("A1").Value = 10
End Sub

How can I undo that?

I feel there ought to be an obvious way...but I can't
find it.

Thanks for any thoughts...

Alex