Think of the Bookmarks Panel (highlighted in red below) as an interactive Table of Contents. You can click on any of the items listed and you will jump to that page in the reading panel. The Bookmarks reflect the Table of Contents published in the top right corner of the paper. If you click on "Pagosa Free Press Website" you will return to the PFP home page.
You can open and close the Bookmarks panel by clicking on the "Bookmarks" tab, on the top left side of the panel.
All PDF pages are displayed to fit in the reading panel size.