Navigation
The three components that tell a reader where they are: side navigation, breadcrumb, and in-page navigation.
None of these are shortcodes. Each one is derived from the site’s structure — the section tree, the page’s ancestry, or the headings in the body — so there is nothing to write in the markdown and nothing to keep in sync by hand.
This subsection also exists to prove the point the side navigation page makes: the tree you are looking at on the left is three levels deep, and it opened itself.
Side navigation
The section tree, rendered from the content directory and opened to the page you are on.
Breadcrumb
The trail from the home page down to the page being read.
In-page navigation
The 'On this page' list, built at runtime from the headings in the body.