Roll20 needs to fix the issue where the map/canvas/tabletop hugs the top left of the screen as you zoom out further and further. You need to be able to drag the map so it stays in the centre of the screen. There have been so many times where I'm running Roll20 through my projector onto a wall for my sessions and I've zoomed a map all the way out for my players to see, but it's completely hugging the left side of the screen (and therefore the left side of the room). It's really irritating for something that should be such a simple fix!