This is a minimalist auto-collapsing example which uses no icons and has ShowToggles set to 'no'. It also shows that you can use different fonts for folders and pages (we're using a bold font for folders).
It also makes two points about colors. First, each item can have its own custom color. Second, by setting InheritColors to 'yes', each item inherits its parent's color. We've set colors for the 4 first-level items, and all the others inherit the colors of their parents.
We're also using the selector bar (by setting ShowSelector to 'yes'). We've set its color to dark blue, but its opacity is set to 40 making it semi-transparent.