[xwiki-users] New installation - top menu bar missing?

Hi, all I'm new to XWiki. Just finished a fresh installation of 8.4.1 with Tomcat any MySQL, which went absolutely smooth - great! I intend to migrate the wiki of a small not-for-profit organisation from Confluence to XWiki, so my first two questions are - how do I create spaces? - how do I get a hierachical navigation tree of all pages in a space on the left? I wouldn't be bothering you without doing some research first, so I found this documentation about spaces: http://platform.xwiki.org/xwiki/bin/view/Features/Spaces#HSpacecreation Unfortunately my XWiki doesn't have that menu bar with the "Home | Main | WebHome | Add" at all! What am I missing here? Completely dumbfounded - the docs say "click Add -> Space" ... Second there seems to be a "Document Tree Macro 8.4.1" extension already installed. How do I get this - and only this - into the left menu column? Thanks a lot for any hints. RTFM perfectly welcome with a pointer to the correct fine manual. Search engine hasn't been of much help, but possibly my google-fu is leaving me ;-) Kind regards, Patrick