PDF Document Properties
The tools in the PDF Document Properties group deal with document wide properties such as page display options and metadata such as Title, Author, Subject and Keywords.
You can control the layout, magnification and viewer preferences for PDFs when they are opened in a conforming PDF reader. For example have the bookmarks panel display automatically when a PDF is opened and have the zoom level set to 125% by default (and much more).
Edit Document Metadata
Add or remove standard document metadata for PDF files such as Title, Author, Subject and Keywords.