area outside of the Contents interface to exit.
Bookmarks
When reading a book, you can tap the Bookmark icon on the upper
right corner to bookmark the current page. Tap the icon again
if you want to un-bookmark the page.
Check all bookmarks at Contents/Bookmark. Tap each bookmark to
jump to the corresponding page. You can also delete bookmarks
here.
Annotations
All highlighted, underlined, and annotated contents are shown
in Contents/Annotations. You can check, edit, and delete all
relevant content here.