Operation Manual

Chapter 3: Function Graphing 121
• 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
ZDecimalZDecimal
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.
ZSquare
ZSquareZSquare
ZSquare
ZSquare replots the functions immediately. It redefines the viewing window based on the
current values of the window variables. It adjusts in only one direction so that @
X=@Y,
which makes the graph of a circle look like a circle.
Xscl and Yscl remain unchanged.
The midpoint of the current graph (not the intersection of the axes) becomes the
midpoint of the new graph.
Xmin=L4.7
Xmax=4.7
Xscl=1
Ymin=L3.1
Ymax=3.1
Yscl=1