you mean like when you move your camera under the water?
You can do that? I thought you could just go in the four directions of the arrow keys!
If you meant using the 2 key to go "down" it doesn't take you underwater, all it does is bring you back "across" 180 degrees to the opposite side to that which you were originally viewing.
As an aside, in lieu of compass points, is there any way to adjust your view by altitude-azimuth coordinates? Or RA/Declination? Maybe thru the console?