Operation Manual

Chapter 3: Function Graphing 86

Exploring Graphs with the ZOOM Instructions

ZOOM Menu

To display the ZOOM menu, press q. You can adjust the viewing window of the graph quickly in

several ways. All ZOOM instructions are accessible from programs.

Note: You can adjust all window variables from the

VARS menu by pressing  1:Window and then

selecting the variable from the X/Y, T/q, or U/V/W menu.

Zoom Cursor

When you select 1:ZBox, 2:Zoom In, or 3:Zoom Out, the cursor on the graph becomes the trace cursor

().

ZBox

To define a new viewing window using ZBox, follow these steps.

1. Select

1:ZBox from the ZOOM menu. The zoom cursor is displayed at the center of the screen.

2. Move the zoom cursor to any spot you want to define as a corner of the box, and then press Í.

When you move the cursor away from the first defined corner, a small, square dot indicates the

spot.

3. Press |, }, ~, or †. As you move the cursor, the sides of the box lengthen or shorten

proportionately on the screen.

Note: To cancel ZBox before you press Í, press ‘.

ZOOM MEMORY

1: ZBox

Draws a box to define the viewing window.

2: Zoom In

Magnifies the graph around the cursor.

3: Zoom Out

Views more of a graph around the cursor.

4: ZDecimal

Sets @X and @Y to 0.05, and sets TraceStep to 0.1.

5: ZSquare

Sets equal-size pixels on the X and Y axes.

6: ZStandard

Sets the standard window variables.

7: ZTrig

Sets the built-in trig window variables.

8: ZInteger

Sets integer values on the X and Y axes.

9: ZoomStat

Sets the values for current stat lists.

0: ZoomFit

Fits YMin and YMax between XMin and XMax.

A: ZQuadrant1

Displays the portion of the graph that is in quadrant 1

B: ZFrac1/2