Setting The Zoom Factors - Texas Instruments TI-80 Manual Book

Setting the Zoom Factors

The Zoom factors, XFACT and YFACT, determine the extent of the change for the
viewing window created by ZOOM IN or ZOOM OUT on a graph.
Zoom Factors
Checking Zoom
Factors
Setting Zoom
Factors from the
Home Screen or
a Program
4-18 Function Graphing
Zoom factors are positive numbers (not necessarily integers)
greater than or equal to 1. They define the magnification or
reduction factor used to
point.
To review the current values of the Zoom factors (
YFACT ):
1. Press L, and then press
2. Press to select
9
is copied to the cursor location.
YFACT
3. Press ¸. The Zoom factor is displayed.
To set the Zoom factors
screen or a program, begin on a blank line.
1. Enter the factor, and then press §.
2. Press L, and then press
3. Press to select
9
is copied to the cursor location on the Home
YFACT
screen.
4. Press ¸ to store the Zoom factor to the variable.
ZOOM IN or ZOOM OUT
to select
1
or to select
XFACT 0
XFACT and YFACT
1 to select
or to select
XFACT 0
around a
XFACT and
.
WINDOW...
. or
YFACT XFACT
from the Home
WINDOW... .
. or
YFACT XFACT