I'd like the ability to change the color of the canvas/page behind the Roll20 game table itself. Right now it's off white with a texture. That's ok, but for some games I want a darker mood. For horror games, it would be nice if I could change that to black. If I could upload a background picture or pattern, that would be even cooler. I don't only run crunchy games. Sometimes I run stylish story games and anything that helps me control the look and mood of the table is helpful.