How can I rotate an object already at an angle? I can't seem to figure out which setting to use for proper hand rotation. It starts out like:



And no matter what XYZ settings I choose, I end up with a result similar to:



...instead of a nice circular rotation in the socket. (The hand is a child of the arm, which is a child of the torso, if that makes any difference.)
If anyone knows what the settings should be, I'd be most grateful.
Thanks, Rich Sedman; locking the X and Y helped this time around, as well as adjusting the 3D cursor to further up the elbow.