Zathura is a simple PDF reader that I use ocassionaly. It's keyboard-driven, has VIM-like shortcuts, and can be setup with a simple config file. If you have an older machine or you\ are just fan of minimalist software, try it. Although if you are using Debian you need to compile zathura-pdf-mupdf manually, since for some reason they are not supporting it. You need this to read epub files.
- zathura-cb - Comicbook support
- zathura-djvu - DjVu support
- zathura-pdf-mupdf - EPUB, PDF and XPS support based on MuPDF
- zathura-pdf-poppler - PDF support based on Poppler
- zathura-ps - PostScript support
Here are some useful stuff for the config file (~/.config/zathura/zathurarc), if you want to make comments for lines use the # sign at the beginning of the line.
Font family and size for the UI:
set font "font family size"
Set the title to the filename:
set window-title-basename true
Invert colors of the document: (C-i, means Ctrl+i)
map <C-i> recolor
Copy selection to clipboard:
set selection-clipboard clipboard
Larger scoll steps with j/k:
set scroll-step 50