Tap\Click 
to open the Table of Contents
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Chapters or Sections without an Arrow
Tap\Click on that line item to automatically navigate to that section within the reader, and the panel will not change. To close, click on the Table of Contents icon or open another panel.
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Chapters or Sections with an Arrow
Tap/Click on any chapter with an arrow (indicating chapter subsections) to move the contents to the next level. Click the blue "Go to Chapter..." link at the top of the panel to navigate to that section of the reader.
Tap\Click any sub-section header to view the sub-sections
Tap\Click
to view the previous table of contents
The blue vertical bar at the far left indicates the current chapter or section being displayed
Tap\click on 
or open another panel to exit the Table of Contents