> How do display a "+" or "-" sign when hiding columns that allows
> someone to click on the + or - as a shortcut to hide or unhide cells?
>
> I want to hide my column and have them click the - sign to unhide.
Select the columns you want to hide, then menu Data, Group and structures,
Group

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(I'm not sure of names of menus, options and commands, because
translating from the Italian version of Excel...)
Hope I helped you.
Thanks in advance for your feedback.
Ciao
Franz Verga from Italy