If you hid them using a macro with xlveryhidden they can only be unhidden by
code.
Else, goto the cells cell(above the 1 and to the left of the A
titles)>format>rows>unhide
OR, row height??? set to 0
--
Don Guillett
Microsoft MVP Excel
SalesAid Software
(E-Mail Removed)
<(E-Mail Removed)> wrote in message
news:829bf3a0-682a-4c6e-bece-(E-Mail Removed)...
>I have an important file that in times past I've been able to hide and
> unhide rows and columns as needed. Now, a number of worksheets will
> suddenly no longer unhide. Is there a way to force hidden columns to
> be unhidden, but will not prevent them from being hidden later?
> Thanks for any help.
>
> Michael