I have a signed document that I need to edit/comment on. Acrobat tells me to save a copy, then open it and then annotate. When I do this, I still get the message that "its a signed document and I can't edit ". Any options?
A digital signature may restrict which operations you can do with the document after it is signed. If the signer chose to lock the document after signing, you cannot edit/comment on it because the previous signer restricted it from being modified.