My apologies if my newbie question has an obvious answer which my searching through Help and the forums here has quite incompetently missed!
Anyway … when I read PDFs in full screen mode 2 pages up [on a 17" MBP] the pages don’t quite fill the screen horizontally: for PDFs from some journals there is about an inch of background either side. This background is white, and stays resolutely white even if I set the background for full screen editing to be black. I’d like that background to be black. What to do?
I’d also really like a PDF to be displayed one page up in e.g. the original threepane window, and flip to two pages up in full screen mode, but I expect that is too much to ask for???