Okular

Okular is a fantastic application to use for viewing and annotating documents like PDF and ebooks.

• Okular is written using the KDE framework, so expect its installation to be heavy:

$ sudo apt install okular

• It supports viewing a whole bunch of formats for viewing: PDF, DjVu, EPUB, TIFF, CHM and other ebook formats.

• By default, the backends for the non-PDF formats are not installed. To get them:

$ sudo apt install okular-extra-backends

• There is full zoom-in, zoom-out, continuous or separated page viewing options.

• Table of contents are shown for ebooks, PDF and DjVu files that have it.

• Thumbnails of current and neighboring pages can be viewed.

• Okular uses a printing backend that is different from the one used by Evince, the default document viewer in Ubuntu. So, if you have printing problems in Evince, try Okular.

• Annotating documents by adding notes, highlighting and freehand is easy.

Tried with: Okular 0.19.3 and Ubuntu 14.04