5.1 Introduction
 5.2 How Does Browsing Work?
  Communication through the Printed Medium
  The Audio Setting
  An Alternative Model
  A naïve Example
  A Complex Example
 5.3 Traversing High-Level Document Structure
  Summarizing the Selection
 5.4 Rendering the Current Selection
  Relative Renderings
 5.5 Cross-References and Bookmarks
  Cross-Referenceable Objects
  Bookmarks