Originally Posted by tomsem

Thanks for the screen capture, the Menu looks the same as before.

There were also options tied to the Aa key before, but looks like those are inaccessible. I think pictures larger than 800x600 will be scaled to fit, the only question is if you can zoom & pan with the more limited keyboard. Of course if you can't zoom, there's no point in having the images larger than 800x600, even if they scale to fit.

If you can bring up the virtual keyboard, however, perhaps the keyboard shortcuts still work:
'f' toggles full screen mode
'r' rotates image 1/4 turn CCW and then back
'q' zooms in (when not in Actual Size mode)
'w' zooms out (")
'e' reset zoom (")
'c' toggles 'Actual Size' mode (displays at 100%)

Presumably the 5way pans as before when you are zoomed in.

Alt+G used to refreshes the pixels and removes 'ghosting' in the image viewer in image viewer, I don't remember the K4 shortcut equivalent mentioned in this thread, but that should work.