When I start a race, I have a black edge around the playing field (the part of the screen that contains the level and the car). I have found a key on my keyboard that makes this area smaller (it can become very small), but I cannot find the key that makes it larger. I want to make it fill the entire screen. Does anyone know a solution to this problem?

wasn't it the + key ? (next to backspace)

The key directly next to my backspace key does nothing. The key next to that one (the + key on my keyboard) is the one that makes the area smaller.

I live in Denmark, so maybe my keyboard layout isn't the same as everybody elses.