The start page in a Wiki library is used as root for the navigation. The text “Wiki Navigation” is linked to this start page.
Every link on this start page which points to another Wiki page is followed to create the navigation tree.
The navigation is cached for 20 minutes. But if a page changes within this time, the navigation will be rebuild and cached automatically.
The Wiki Navigation uses the same CSS as the Quick launch TreeView. This way it does not break the layout, if a node text is too long.