Texas Instruments TI-80 Manual Book page 115

PT.OFF(
PT.CHANGE(
From the Home
Screen or a
Program
Procedures for using
2) to turn off (erase) a point and
DRAW POINTS , item 3) to toggle (reverse) a point on and off
are the same as for
When you use these instructions from the Home screen or a
program, you must specify the X-coordinate and the
Y-coordinate of the point as arguments for the instructions.
PT.ON( turns on the point at (
point off, and PT.CHANGE(
off.
PT.ON( X , Y )
PT.OFF( X , Y )
PT.CHANGE( X , Y
(point off,
PT.OFF(
PT.CHANGE(
PT.ON( .
X =X,
toggles the point between on and
)
DRAW POINTS
(point change
Y =Y). PT.OFF( turns the
Draw Operations 7-11
, item
,