Hi,



I added "developer tab" in ribbon, then went to legacy tools and clicked check box. It adds check box in screen but if I want to uncheck/check it again, how I can do it?


I even tried product document >> restrict formatting and editing >> allow only this of editing in document >> filling in forms >> and created password

but still I can't check/uncheck

You're using a checkbox formfield, which only works once formfield protection is applied. Once that is applied, as indicated in the latter part of your post, simply clicking on the checkbox should be enough to change its state.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]