XnView Software

In 0.35 Linux version,(maybe before also) the key PageDown is strenge in Xnview MP :
- In one imageview mode (F11) or fullscreen, it display next image
- In the explore view(thumbail view) , it not the next image, but the image on the next line --> this mode is strenge for me ....

It's a standard behavior, it works the same in XnView Windows and in other image viewers too. In MP you can change all keyboard shortcuts, different for view mode and browser.