We have an extensive ((ThemeTutorial)), which gives you an outline how our themes work, how you create a theme. It includes some basic CSS rules.
-!! How do I change the center width when side columns disappear?
+!! How do I change the layout of columns, including shuffling them, or hiding them?
Bitweaver version 2 and above has a feature called ((StyleLayouts)) which takes care of this automatically (a specific CSS class name is applied to the center column depending on what side columns are visible). Which columns or content areas appear to the users can be controlled manually: ''Administration -> Themes -> Columns''.
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+!! How do I customize the top menu?
+You can make all sorts of customizations to the top menu, you will find options at: ''Administration -> Themes -> Menus''