1. Seeing all the pages : Site.AllRecentChanges
  2. A link has 2 parts : Group.Name so for example this very page has a name Wiki in the group Internal.
  3. Having page in groups allows to give them similar looks e.g. Hardware makes a nice table with photos first.
  4. The left menu is a page just like the other and can be changed : Site.SideBar
  5. To create a new page in a group write it in any other page of the same group e.g. Wiki1234?
    1. it will make a link to it with a question mark. This shows that the page does not exist yet.
    2. click on it, edit it, save and that's it a new page.