PDF Options dialog box
1. In the Document tab:
2. In the Security tab:
• Specify Require password to open the file or Require password to control printing, editing and security and assign passwords to the PDF file.
• Specify printing and editing privileges. If printing and editing privileges are allowed, specify if copying and screen reading software are permitted.
3. In the Initial View tab:
4. Click OK.
• In the Security tab, if you specify Require password to open the file, the password will be required when a user opens the PDF file using any application that enforces passwords such as Adobe Reader, Adobe Acrobat Professional, or Apple Preview. If you specify Require password to control printing, editing and security, the password will be required when a user opens the PDF file using an application that allows a user to modify privileges on the file such as Adobe Acrobat Professional. The password will be required before a user can modify the privileges on the file.
• If either password option is specified in the PDF file, the file will be protected and its contents will also be encrypted. An encrypted PDF file's content appears as "unreadable text" when opened using non-PDF reading applications. The file's content cannot be indexed by the operating system and search engines, which means users will not be able to search for content within the document using desktop and internet search utilities.
• If no password is specified for the PDF file, the file's contents are fully readable using other applications and can be indexed and searched on using search applications and utilities. Also, because there is no password protection, the file can be opened by anyone.