Texas Instruments TI-73 EXPLORER - Manual (Page 208)

202
Chapter 10: Drawing
7310ENG.DOC Draw Texas Instruments Revised: 05/29/98 6:43 PM Printed: 05/19/99 9:01 AM Page 202 of 22
Pt-On(, Pt-Off(, and Pt-Change( Pt-On(, Pt-Off(, and Pt-Change(
2
" 1, 2, and 3 1, 2, and 3
Pt-On(
,
Pt-Off(
, and
Pt-Change(
turn on, off, or change the status
of a point from the Graph screen, Home screen, or Program
editor.
A point (as opposed to a pixel) is tied directly to the X- and Y-
axes. The screen is divided into X- and Y-coordinates as
specified by (X,Y). The points that you can view depend upon
how the
WINDOW
values are defined.
For example, if standard
WINDOW
values are set, M10X10 and
M10Y10. This does not mean that points outside these
boundaries do not exist, only that you cannot see any turned
on points outside these boundaries.
Pt-On(, Pt-Off( and Pt-Change( from the Graph Screen
To use
Pt-On(
,
Pt-Off(
, and
Pt-Change(
on the Graph screen:
1. From the Graph screen, select 2 "
1
,
2
, or
3
. The
cursor appears in the middle of the Graph screen. The X-
and Y-coordinates are shown at the bottom of the screen.
2. Move the cursor:
• To the position where you want to draw the point
(
Pt-On(
).
• To the position of the point you want to erase
(
Pt-Off(
).
• To the position of the point you want to change
(toggle on or off) (
Pt-Change(
).
3. Press b to draw, erase, or change the point.
4. Repeat steps 2 and 3, as necessary. To cancel
Pt-On(
,
Pt-Off(
, or
Pt-Change(
, press :.