Open the PDF in Acrobat (or your favorite PDF viewer/reader).
If you do not see the Bookmarks icon, you may need to click the small arrowhead on the left edge of the window.
If you are using a PDF viewer/reader other than Adobe Acrobat, you will have to consult that program’s documentation to discover how to access the Bookmarks feature.
Behold, our amazing bookmarks!
NOTE: If you do not see the bookmarks listed, you may need to activate them in the Acrobat application. Select View -> Show/Hide -> Navigation Pane -> Bookmarks.
Now you always have your Table of Contents in view regardless of your location within the document.
If you have a multi-level hierarchy in the bookmarks, you can expand all levels or collapse all levels by selecting the Bookmark Options button and select either “Expand Top-Level Bookmarks” or “Collapse Top-Level Bookmarks”.