990 bytes added,
22:32, 29 January 2018 Has some good features such as the ability to control the action of the mouse wheel (scroll though images in a directory or zoom level). However, it is not in the default repository. Use this if you don't care for Geeqie, however, I still prefer Geeqie.
sudo add-apt-repository ppa:skellat/flow1
sudo apt-get update
apt-get install viewnior
Missing feature: when you zoom in on an image the window does not automatically enlarge.
viewnoir can edit and save which I don't need in an "image viewer."
You can remove the repository without uninstalling viewnoir (I don't necessarily want other software from skellat, but if you do, then leave it.
add-apt-repository --remove ppa:skellat/flow1
If you want to delete a PPA repository as well as all packages installed/upgraded from the PPA, you can use "ppa-purge" command, simultaneously this downgrading installed packages to the version from official mint base. But to keep viewnoir after removing the repository do not "ppa-purge."