I have very recently started working with pdfs. I need to disable printing of my pdfs based on user types. Can someone please tell me how to do this? The pdfs I need to manipulate have the following information in their Document properties: "Application = QuarkXPress 4.11 LaserWriter 8 8.7.1", "PDFProducer=Acrobat Distiller 5.0.5 for Macintosh", "PDFVersion=1.6 (Acrobat 7.0)"