It might be that you've set Freeze Panes. Try Window, Unfreeze Panes.

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Jim
"Shane Browning" wrote in message
...
I have just opened an Excel s/sheet that I used last week and find that in
two of the tabs i now have hidden colums (A to Z). I have done nothing to
hide them and everything I do to try and unhide them does not work.?
Please help
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SJB