Seems like a minor ask at present, but I know one other member who has gone over to DPR Clone just because of this. Unfortunate.
EDIT : I was writing the below in relation to what I was seeing on my iPhone...
< on a computer web browser, images are opened centrally and on a dark grey background! - so it's only the mobile version that needs sorting...
Just that when images are opened into their own window they currently are stuck to the top of the screen. They just need to be centred.
Also have a max-width of 95% the view width, or add a thin margin, just to keep image away from the edges. Doesn't need to be a lot, just a slither would be fine.
Mainly, just centre opened images. If you can do this quick it would help us who like to 'open' embedded photos to view.
Secondly, many do like a dark theme for photo viewing (as if in a dark room looking at a light box), it could be added here first, a very dark grey background to opened photos.
Many thanks, keep pushing forward!