Please add the possibility to bookmark, mark text and add notes.

Binary package hint: evince

Please add the ability to bookmark the text at several positions and to name them.
For example if nobody made an index for the sidepanel or more importantly if
you just want to jump to a certain area in the text.
Please add also the ability to mark text with different colors and that the marks can
overlap eachother and to turn them all off or just one of them.
You score every aspect if you combine all of it, like the possibility to jump to a certain
area that is marked and notes are added to the markings as well as independently
on the left or right of the book.
My recommendation is a single file for every document otherwise the management
code eats up too much space.

:)