Here is the same image with resolution 320x240 enlarged to 640x480 in xnview - edit mode and in the slide show:

Moderators: helmut, XnTriq, xnview
I think that you have that with old version too, high quality is only for reduceDreamer wrote:I see no difference if this option is enabled, or disabled.
Here is the same image with resolution 320x240 enlarged to 640x480 in xnview - edit mode and in the slide show: