Sumatra can do side by side with or without a cover page but I don't think you can do a frameless UI and the dark theme is a bit fugly. It is a fairly mature p

Sumatra can do side by side with or without a cover page but I don't think you can do a frameless UI and the dark theme is a bit fugly. It is a fairly mature program, it's just that the developer decided to maximize on "small" and "fast" at the expense of other things.