Let's say I'm working on UI. I am zoomed in on a particular button. But I want to see a bit more so I do shift+spacebar to fullscreen my Scene view. What happens is that - especially if I'm zoomed in - once fullscreened the scene camera shifts its point of focus far away from that button, which was in the center of the scene view, to way off-screen. So, to get back to the button I was working on I have to zoom out and then zoom back in on it. That is annoying. It would be much better if when switching between fullscreen and not for Scene view it retained its center point so that the thing I was working on, or whatever is central, stays put at the center point.