Trisdiastaton structure is composed of four containers: Header, Sidebar, Content and Footer. Except by the content container, all other containers have fixed positions in the page and will not follow page scroll.
Note how Trisdiastaton has no standard Rapidweaver navigation menu. This is because all page-levels are developed inside a single Stacks page.
In Trisdiastaton, pages are related to levels. All levels are developed inside a single Stacks page.
It is possible to develop up to ten levels, numbered 0 to 9 (and not 1 to 10).
The controller script will detect how many levels were added and will stop page scrolling at the last level.