Man Page Lookup searches for man pages name and section as given in the selection menu and the query dialog.

Apropos Keyword Search searches the database for the string given in the query dialog. There are also several hypertext links provided as short-cuts to various queries:

• Section Indexes is apropos listings of all man pages by section.
• Explanations of Man Sections contains pointers to the intro pages for various man sections.

Or you can select a category from Quick Reference Categories and see man pages relevant to the selected topic.