Here are a list of some of the keyboard commands (not vim3d commands) to toggle various features

a: toggle lights display
t: toggle textures
s: smooth shading
u: undo
v: redo
w: wireframe
o: orthogrid
2: top view
i: insert new curve
j: select previous object
l: select next object
n: display lights as geometry
p: points display
5: toggle display lists on/off
6: toggle terminal display on/off
9: capture current frame buffer to disk
8: toggle orthogonal snapping for drawing
0: toggle display mode