by cousteau » Sun Jan 31, 2010 1:56 am
Holding the X key should lock the Y and Z axis; holding both X and Y should lock the Z axis. (Which one is which one, btw? Maybe H, V and D are better suited)
Another idea is to take advantage of the 3 buttons mice have (or 2 + clicking both). This way, you could set MakeHuman to only move/scale parallel with the surface when you left-click, and perpendicularly when right-clicking. (Middle click would be free moving, along the 3 dimensions)