The period [.] key adjusts the internal cockpit light level.
I did not even know this command existed until a few days ago. I dropped into River City Night and I saw that might cockpit was really bright. it was like driving a car at night with the roof lights on. I mentioned this on chat and a player told me the internal cockpit light level could be adjusted by pressing period.
When playing on dark maps the cockpit is really bright and looks a little washed out. This is due to the internal lights. The lights default setting is full brightness. A player can toggle through 3-4 levels of brightness using the period key.
Not only does this changes the light level but the dashboard lights get brighter when over head lights are set to off. It looks really cool on night maps.
This is most noticeable on the raven. It has to monitors in the upper corners of the screen.
I also changed my FOV to 80. This really makes the light level stand out and can be rather distracting on darker maps. It also looks very cool when you turn the light level down. All those dashboard lights come on.
Edit:
I added in the rest of the missing commands.
Edited by Dirus Nigh, 16 January 2013 - 05:46 PM.