Adobe Acrobat is the application used for creating, modifying, and editing Portable Document Format (PDF) documents. Adobe Acrobat will allow the document creator (or editor) to restrict the “Save” and “Save As” functions, making the PDF a read-only document. This functionality is invoked in the Security section of the Adobe Acrobat interface by setting a password for accessing editing and saving functions. Configuring a PDF document to read-only status using the password function is accomplished with just a few simple steps in Adobe Acrobat. Writer Bio

How to Restrict  Save  and  Save As  in PDF - 29