Actually the main window may look like anything because its appearance is completely configurable via template themes. This page describes the default template that comes with DokuWiki.
Screenshot:
On the very top left you see the title of the page. On the right you see the title of this wiki installation. In the second line you see a grey-blueish bar with some buttons. Let's go through them one by one.
The third line starts with the word “Trace:”. After that is a list of pages that you've just read, like the history function in your browser. Read breadcrumbs for more info.
Note that another kind of breadcrumb is available, which displays the hierarchy of namespaces the current page is in. See the youarehere configuration setting.
The main part of the window is taken by the content area. This is where your wiki source is shown and rendered. See page structure for more info.
The bottom part of the page is populated with :
Edit and Old revisions, or :Sitemap which shows an index of the pages and namespacesBack to top, a shortcut to get you back to top on long pages