GemCad 3.92 Command Summary 
 
a  angle: set the angle of a new facet 
b  blink: recompute the facet surrounding the cursor 
c  center the current view about the cursor 
d  draw the stone again, discard set points 
e  edge: set a point of a new facet on the edge of an old facet nearest cursor 
f  facet: set a point of a new facet on the interior of an old facet at cursor 
g  gear: change the index gear 
h  help: print out help for next command instead of doing next command 
i  index: set the index of a new facet 
j  jam: set the index of a new facet to that of the facet surrounding the cursor
k  kill the facet surrounding the cursor 
l  list cutting schedule of angles and indexes to screen 
m  meet: set a point of a new facet at the existing meet point nearest cursor 
n  name (label) the facet surrounding the cursor 
p  pierce: set a point of a new facet where the cursor pierces the zero plane 
q  query user for x, y, and z coordinates of a point of a new facet
r  rotate/tilt the stone; will prompt for what fraction of a revolution 
s  save the project as a binary file with the existing project name 
t  time-lapse, turn time-lapse on/off 
u  undo the last command which changed the stone 
v  vector: display distance, angle and index of line joining last two points
w  waytwace: trace a light ray from cursor into stone and back out of stone 
x  xfer: transfer the stone 
y  sYmmetry: change the degree of radial sym. and whether mirror-image sym. 
z  zoom in on the view surrounding the cursor or zoom back out again 
A  Angle: get angle of facet surrounding cursor and set it for a new facet
B  blink: recompute a tier of facets, one of which surrounds cursor 
C  change the facet surrounding by the cursor: next new facet will replace it 
D  demo: demonstrate GemCad by repeatedly cutting the current design
E  export project as a Long & Steele GDP3DA format file
I  index of refraction: change it and print the critical angle 
K  kill a tier of facets, one of which surrounds cursor 
L  list cutting schedule of angles and indexes to a file 
M  iMport project from a Long & Steele GDP3DA format file
N  new cut: TRASHES EXISTING PROJECT 
O  open an existing project: read from a binary file 
P  playback: recut the current design
Q  quit
R  read a project from a text file (such as made by the W command) 
S  save the project as a binary file with a new project name 
T  tangent ratio scale top or bottom keying off of facet surrounding cursor 
V  vector: set the unit distance for the v command
W  write the project as a text file 
X  scale the stone: change angles, shrink, enlarge, stretch, etc. 
Z  set a point where the facet surrounding the cursor meets the dop (z) axis
!  Escape to DOS; will prompt for a one-line DOS command
-  construction line: 1st time starts at cursor, 2nd time draws to cursor 
F10 Screen dump to IBM ProPrinter or Hewlett-Packard 'Jet printer on LPT1
SPACEBAR  draw crosshairs intersecting at cursor

Mouse Buttons:  LEFT           CENTER             RIGHT
     Graphics:  m (meet pt.)   f (pt. on facet)   e (pt. on edge)
         Text:  y              Backspace          Enter