You can set the Security Properties of a PDF file in Adobe Acrobat, as mentioned in my post in your other thread. There are separate Acrobat Macintosh and Acrobat Windows forums. However, be advised that there are commercial programs legally available that can take any supposedly protected PDF and generate an exact, unprotected clone of the document in a matter of seconds. I use PDFkeyPro myself on my Macs, mainly to circumvent editing "protection" in things like multilingual user manuals, where one version is enough so the others can be discarded, and to edit the Chinglish and Japenglish gibberish on such documents to make them understandable. The "protection" touted by Adobe is completely illusory.
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