The breadcrumb above the page title will always have links to this homepage, and the page immediately above this one in the tree. Clicking the ellipsis in the breadcrumb will show the entire breadcrumb. There is also a navigation pane to the left - if you cannot see it, you can show it with the button to the left of the search box at the top of the page.
More operational documentation is being updated and will be moving into this space soon. Until then it can be accessed via the old OpenAthens LA documentation pages