@TNiga I like your idea, although subpages would still not be available in full screen mode.. maybe even the full screen mode could have 4 buttons, two on each side which would be the previous, previous subpage, next, next subpage. There is some leftover room that could be utilized.

@Opa Great, good to hear it works! About the image size, it can probably still be optimized a little bit. Will take a look at it once the other parts are stable. Meanwhile, check the full screen mode by tapping the image if you haven't already.