Select a non-series race. When the screen fades, hold L + R + C-Up + C-Down + C-Left + C-Right + Down and wait until the track selection screen has fully appeared. Then, press Right until an option to adjust the fog color appears.
Change screen position
During a single player race, hold L + R + Start on controller two and move the Analog-stick on that controller.
Mirrored series tracks
Select practice mode and choose the mirrored version of any track. Once on the track, exit and begin a race in series mode. The series track will now be the mirrored version.
