quick  note:  Most of the commands below HAVE NOT BEEN TESTED.  If you
have  problems  with  anyone  of  them,  let me know.  (I do know that
"CLOSE n" does not work..  It'll close the current project instead.)

Here's a quick list of supported REXX commands as of version 2.94e:

  QUIT FORCE/S
r=OPEN FILE,NEW/S
  DOTISSTANDARD
  MARKASSTANDARD PROJECT/N
  SAVE FILE,NEWICON/S
  RESTORE FORCE/S
  CLOSE PROJECT/N,FORCE/S
r=CLOSESTCOLOR RED/N/A,GREEN/N/A,BLUE/N/A
  SCREENTOFRONT
  BUFFERSIZE X/N,Y/N
  HIGHLIGHT C=COMPLEMENT/S,B=BACKFILL/S,I=IMAGE/S
  ICONTYPE TYPE/N,PROJECT/S,TOOL/S,DRAWER/S
  ABOUT
  AIRBRUSH SMALL/S,MED/S,LARGE/S,DRIP/S,NORMAL/S,FOCAS/S,EVEN/S
  BRUSH LEFT/N,TOP/N,WIDTH/N,HEIGHT/N,WHICH/N,CUT/S
  CIRCLE X/N,Y/N,RADX/N,RADY/N,FILL/S
  CLEAR
  COLOR
  MATTE
  REPLACE
  XOR
  SMOOTH
  LOCKGUI
  UNLOCKGUI
  UNDO ALL/S
  REDO ALL/S
r=GETCOORD X/S,Y/S
  PLOT X/N,Y/N
  FILL X/N,Y/N
  SETFGCOLOR PENNUM/N/A
r=GETFGCOLOR
  SETBGCOLOR PENNUM/N/A
r=GETBGCOLOR
r=GETPIXEL X/N,Y/N
  FREEHAND FILL/S
  DOUBLEBRUSH X/S,Y/S
  LEFTMOUSE UP/S,DOWN/S,CLICK/S
  RIGHTMOUSE UP/S,DOWN/S,CLICK/S
  MOVETO X/N,Y/N
r=GETBUFFERSIZE W=WIDTH/S,H=HEIGHT/S
  CHANGESAVESIZE MODE/N/A
  CHANGESAVEDEPTH MODE/N/A
  PASTE OTHER/S
  CUT
  COPY
  ERASE
  EXCHANGE
  FLUSHUNDOS ALL/S,FORCE/S