PDF Document Properties
The Document Properties dialog displays metadata, or information about the file. This includes the document title, author, subject, application used for creating file, and a list of used fonts. To open the corresponding dialog, choose File > Properties or press Ctrl + D.
The Document Properties dialog consist of five tabs:
These tabs contain options that also allow limiting access to a PDF document with a password or digital certificate, modifying the initial view of the workspace, and setting the actions executed upon opening the document.
More like this:
Securing PDFs with a Password
Encryption PDFs with a Certificate
Viewing PDF Files
Editing Text in PDF Documents