In a WebCT site, every page contains by default a navigation header and side panel. Instructors select icons to construct additional navigation options. In a Blackboard site, every page contains by default all appropriate navigation, headers, and footers. The frames and buttons use a lot of screen real estate. In Prometheus, every page contains by default all appropriate navigation, headers, and footers.
Students can set the colors and display options, rather than using options set by the instructor.