A quick introduction of the Outline List and its features.
A PDF document can contain a Table of Contents (also called document outline). PDF Viewer provides a convenient Outline List that can be accessed by tapping the outline icon in the app bar (the second icon in the bar, looking like a book).
The Outline List features a search field, with which you can filter outline elements based on their title. Furthermore, it allows you to expand and the outline hierarchy, making it easier to browse large documents.