XnView Software

First: I am not sure that Options>View>High quality zoom: 'Fit to Window/Desktop' actually work.
(uncheck 'Reduce'/'Enlarge' and keep 'fit' only -> I can't get any HQ when fit zoom is used)

I suppose it's for people who want quality only for "fit" (with fullscreen/windowed/preview) but don't want this CPU drawback while normal zooming...
But I'm not sure this option actually makes sense. What do you think?

XnView 1.90 <x>

Well, it didn't work some time ago. Someone reported the bug and it got fixed. Looks like the bug is back - at least in fullscreen view.

I use this option btw. But in the end only activating 'reduce' has almost the same effect (zooming out will take longer) so...

In v.1.90.3, there is only HQ settings reduce & enlarge. The others have been replaced.
--->Resolved