Texas Instruments TI-83 PLUS - Manual (Page 144)

TI-83 Plus Function Graphing 141
4. Press Í . The TI-83 Plus adjusts the viewing window by XFact and
YFact ; updates the window variables; and replots the selected
functions, centered on the cursor location.
5. Zoom in on the graph again in either of two ways.
•
To zoom in at the same point, press Í .
•
To zoom in at a new point, move the cursor to the point that you
want as the center of the new viewing window, and then press
Í .
To zoom out on a graph, select 3:Zoom Out and repeat steps 3 through 5.
To cancel Zoom In or Zoom Out , press ‘ .
ZDecimal
ZDecimal replots the functions immediately. It updates the window
variables to preset values, as shown below. These values set
@ X and
@ Y
equal to 0.1 and set the X and Y value of each pixel to one decimal place.
Xmin= L 4.7 Ymin= L 3.1
Xmax=4.7 Ymax=3.1
Xscl=1 Yscl=1