I created a document in Acrobat X Pro v10.1.16, and used the security feature so that you would need a password to edit the document. I created the document at home, and now am testing it at work. I was able to open the document, and the contents are NOT editable, which is what I want, but if I was to edit it, where and when do I get the opportunity to input the password I created. There doesn't seem to be a way to edit the document with the password I have. I tested the PDF with Adobe Reader XI, 11.0.06.
Thanks in advanced for your help.....!
Use Adobe Acrobat, not Reader.
To edit you must remove the security again with Acrobat, then save. This isn't always possible, always archive the unprotected file.