| 81897 |  GROB! | ( grob1 grob2 #x #y →  )Stores grob1 into grob2. Bang type.
 | 
| 82251 |  GROB+# | ( flag grob1 grob2 #x #y → grob' )Inserts grob2 into the specified position of
grob1, using OR (if flag is
 TRUE) or XOR (if
flag isFALSE).  Does all necessary checks first. | 
| 8189C |  GROB!ZERO | ( grob #x1 #y1 #x2 #y2 → grob' )Blanks a rectangular region of the grob. Bang
type.
 | 
| 84290 |  GROB!ZERODRP | ( grob #x1 #y1 #x2 #y2 →  )Blanks a rectangular region of the
grob. Probably only useful if grob is the
text or graphics grob (see section on
display-organization). Bang type.
 | 
| 818B5 |  SUBGROB | ( grob #x1 #y1 #x2 #y2 → grob' )Returns specified portion of grob.
 | 
| 824EF |  XYGROBDISP | ( #x #y grob →  )Stores grob in HARDBUFF with upper left
corner at (#x,#y).  HARDBUFF is expanded if
necessary.
 | 
| 82265 |  GROB>GDISP | ( grob →  )Stores new graph grob.
 | 
| 818B0 |  MAKEGROB | ( #height #width → grob )Creates a blank grob.
 | 
| 818AB |  INVGROB | ( grob → grob' )Inverts grob data bits. Bang type.
 | 
| 81AFE |  PIXON | ( #x #y →  )Sets  pixel in text grob.
 | 
| 81AF4 |  PIXOFF | ( #x #y →  )Clears pixel in text grob.
 | 
| 81B03 |  PIXON? | ( #x #y → flag )Is pixel in text grob on?
 | 
| 81B08 |  PIXON3 | ( #x #y →  )Sets  pixel in graph grob.
 | 
| 81AF9 |  PIXOFF3 | ( #x #y →  )Clears pixel in graph grob.
 | 
| 81B0D |  PIXON?3 | ( #x #y → flag )Is pixel in graph grob on?
 | 
| 81BBC |  LINEON | ( #x1 #y1 #x2 #y2 →  )Draws a line in text grob.
 | 
| 81BB2 |  LINEOFF | ( #x1 #y1 #x2 #y2 →  )Clears a line in text grob.
 | 
| 81BC6 |  TOGLINE | ( #x1 #y1 #x2 #y2 →  )Toggles a line in text grob.
 | 
| 81BC1 |  LINEON3 | ( #x1 #y1 #x2 #y2 →  )Draws a line in graph grob.
 | 
| 81BB7 |  LINEOFF3 | ( #x1 #y1 #x2 #y2 →  )Clears a line in graph grob.
 | 
| 81BCB |  TOGLINE3 | ( #x1 #y1 #x2 #y2 →  )Toggles a line in graph grob.
 | 
| 821D9 |  DOLCD> | (  → grob )Returns current display.
 |