The Navigation View is used primarily to create and maintain the
basic structure of your site. In it you can drag pages onto the
structure, create new pages, move pages around in the structure (thereby
affecting the Link Bars, both in content and in the ordering of the
buttons), and rename the pages as the will appear in the Navigation
Bars. (Remember that there are three names for every page: the file name
(page.htm), the Page Title (File... Properties... menu choice), and the
navigation title that you set here. They show up in different places.
The Navigation View works closely with both Themes and Shared Borders
to create a comprehensive look, feel, and navigation structure for your
site.