Texas Instruments TI-89 Manual Book page 138

Changing Zoom
Factors
Tip: To exit without saving
any changes, press N.
Saving or Recalling
a Viewing Window
Note: You can store only
one set of Window variable
values at a time. Storing a
new set overwrites the old
set.
Restoring the
Standard Viewing
Window
The factors define the magnification and reduction used by
Zoom
and .
ZoomIn ZoomOut
1. From the „
Zoom
FACTORS dialog box.
2. Use D and C to highlight the value you want to change. Then:
¦
Type the new value. The old value is cleared automatically
when you begin typing.
— or —
¦
Press A or B to remove the highlighting, and then edit the old
value.
3. Press ¸ (after typing in an input box, you must press ¸
twice) to save any changes and exit the dialog box.
After using various
Zoom
viewing window or save the current one.
1. From the „
Zoom
to display its
B:Memory
submenu.
2. Select the applicable item.
Select: To:
Return to the viewing window displayed before
1:ZoomPrev
the previous zoom.
Save the current viewing window. (The current
2:ZoomSto
Window variable values are stored to the system
variables
Recall the viewing window last stored with
3:ZoomRcl
ZoomSto.
You can restore the Window variables to their default values at any
time.
From the „
menu, select
Zoom
menu, select
C:SetFactors
factors must be ‚ 1, but
Zoom
they do not have to be integers.
The default setting is 4.
tools, you may want to return to a previous
menu, select
, , etc.)
zxmin zxmax
6:ZoomStd.
Chapter 6: Basic Function Graphing
to display the
ZOOM
121