XnView Software

But this thumbnails are too small for my purposes. Where can I change the user defined size?

I would like to have quadratic thumbnails (so thumbnails in portrait mode and in landscape mode have the same area). In XNView there was no problem to configure this, but in XNViewMP I can´t manage it.

I already set this options with a text editor. But I would like to change it via the GUI. An alternate idea would be an option in the GUI to fix the aspekt ratio of the thumbnails. So I could fix it to 1:1.

In the regular version of XnView you can set the size of the thumbnails totally free. I miss this option in XnViewMP for I prefere quadratic thumbnails so that the shown area of the thumbnails is the same regardless of the pictue is taken in landscape or in portrait mode.