
Here's why I would like the zoom and pan features: When I'm in an online meeting I quite regularly have images or photos to show people. Very often someone in the meeting, or myself, would like to point out a small area on the image. The best way to do that is to zoom in (like you can on XNView's individual image browser). Then once zoomed in, of course, you have to pan to that area to see it.
Right now I have to do one of two things, either 1) exit slideshow and find the image to show in the browser view; and then go back and try to find my spot in slideshow view when I'm done, or 2) upload all my images to google photos and use the slideshow there (which supports zooming and panning).
Both of those workarounds are clunky to say the least.