How to highlight and annotate PDF and DjVu documents? [duplicate]

Solution 1:

Okular can be used to view, highlight and annotate (with sticky notes) both pdf and djvu files. After opening the document in Okular, press F6 (or Fn key + F6). The controls to highlight, annotate will appear(along with some more tools).

A small hitch: By default these annotations are stored outside the document. So if you mail the document to somebody, he/she will not be able to see the annotations/highlights. But there are ways around this problem (as described in the official help page of Okular)

Solution 2:

Try Xournal:

Xournal is a GTK+ application for notetaking, sketching and keeping a journal using a stylus. It can also be used to add annotations to PDF files.

Solution 3:

Try PDF-Xchange Editor and zathura. It allows you to open multiple files in tabs and functions both as a good viewer. It stores annotations/comments within the file.

To install in Ubuntu follow these instructions