I don’t know if I’m just missing something, but is it possible to crop the full image previews to just take up a variable amount of height in the feed (like boost)? I’d prefer my images not take up more than 2/3rds of my full screen height so I can always see the post title.
Yep. It should be called “Prefer full size image”. If you disable that Summit will enforce a maximum height on the image.