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4.7.2 Preparing the Display

8230F RECLAIMDISP ( → )
Activates the text grob, clears it and sets the default size.
824B3 MENUOFF? ( → flag )
Returns TRUE if the menu grob is off.
8249F TURNMENUOFF ( → )
Turns off menu display, enlarges ABUFF to fill screen.
824A9 TURNMENUON ( → )
Turns menu grob on.
81AC2 HEIGHTENGROB ( grob #rows → )
Heightens graph or text grob.
81AC7 KILLGDISP ( → )
Clears graph display by setting it to NULLGROB. See DOERASE.
821BB DOERASE ( → )
Erases the graphics display grob without changing its size.



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