The PageIndex shows the list of all pages in a wiki. This is one of the fundamental wiki features.
In ProWiki this is usually directly accessible from the UserInterface. If it is not you can access it directly from the command line "...?action=index" (See ActionIndex).
See also ActionSpx, especially if you want to show an index for a SubWiki.
FolderWikiFeatures FolderStructures FolderNavigation FolderTransparency