In previous versions of Ubuntu I could select multiple images and view them in a single Image Viewer window. In 18.04.1 it seems that a separate window/task is created for each selected image. Is there any way to get the old behavior of viewing multiple selected images with a single Image Viewer instance?
View files one by one in one single window
If you start Eye of Gnome,
eog, and click on the icon with three horizontal lines, you can select Open... , get a window with files and directories, and then mark a few files. Click on Open and the files you selected will be the only files that you can view in the
View several files side by side in one single window
You can install
sudo apt install feh
and use it to make a montage, which means that you can view several files in the same window.
feh --limit-height 700 --limit-width 1300 --montage --thumb-height 300 --thumb-width 600 file1.png file2.png file3.png file4.png feh --fullscreen --montage --thumb-height 600 --thumb-width 800 Pictures/
In the fullscreen example you can zoom with the up/down arrows and then 'pull' the picture-montage with the mouse (grab with the left button and move) to scroll the zoomed pictures. Notice that the resolution depends on the thumb-height and thumb-width.
You can use Mulimg_viewer. (This is my repository).
Mulimg viewer is a multi-image viewer that can open multiple images in one interface, which is convenient for image comparison and image stitching.
Mulimg_viewer supports sequential and parallel mode to display image.
Mulimg_viewer is implemented in python and currently provides Windows 10 and Ubuntu 18.04 versions.
Future: The parallel zoom function of the picture is being realized and I believe it will be released soon.