media-gfx/feh
A fast, lightweight imageviewer using imlib2
USE Flags
debug
Global: Enable extra debug codepaths, like asserts and extra output. If you want to get meaningful backtraces see http://www.gentoo.org/proj/en/qa/backtraces.xml
curl
Global: Adds support for client-side URL transfer library
exif
Global: Adds support for reading EXIF headers from JPEG and TIFF images
test
Global: Workaround to pull in packages needed to run with FEATURES=test. Portage-2.1.2 handles this internally, so don't set it in make.conf/package.use anymore
xinerama
Global: Add support for the xinerama X11 extension, which allows you to stretch your display across multiple monitors
inotify
Global: Enable inotify filesystem monitoring support