0: Exit from the program.
1: Invoke hardcopy making utility.
   If you just get back from auxiliary layout and would like
   to have the changes just made in the layout to show up on
   the hardcopy, redraw the plot before invoking the hardcopy.
2: Invoke auxiliary layout utility.
3: Plot another ORTEP file.
4: Perform an incremental non-cumulative 3-D rotation and prompt
   will follow for rotations angles, where H,V,P stand for Horizontal,
   Vertical, and Projection axes of the structure.
       Positive/negative angle -> counter/clockwise rotation.
   You MUST have a 502 instruction in the input file.
5: Perform rescaling of probability ellipsoids if you use 
   604 auto-scaling command instruction in the input file.
   Prompt will follow for the thermal ellipsoid probability index.
6: Redraw the plot.
$: Spawn a system subprocess.
PF1: Invoke hardcopy making utility without the page setup menu.
PF2: Invoke this help menu.
PF4: Spawn a system subprocess.
