Texas Instruments TI-83 PLUS - Manual (Page 149)

TI-83 Plus Function Graphing 146
Changing XFact and YFact
You can change XFact and YFact in either of two ways.
•
Enter a new value. The original value is cleared automatically when
you enter the first digit.
•
Place the cursor on the digit you want to change, and then enter a
value or press
{ to delete it.
Using ZOOM MEMORY Menu Items from the Home Screen or a
Program
From the home screen or a program, you can store directly to any of the
user-defined
ZOOM
variables.
From a program, you can select the ZoomSto and ZoomRcl instructions
from the
ZOOM MEMORY
menu.