The ZStandard, ZDecimal, ZTrip, and ZQuadrant1 zoom commands help you initially graph or regraph your function in a preset viewing window. To use these zoom commands, enter your function into the calculator, press [ZOOM], and then press the key for the number of the command. The graph automatically appears.
ZStandard zoom command on the TI-84 Plus
This command graphs your function in a preset viewing window where
![image0.jpg](https://www.dummies.com/wp-content/uploads/398846.image0.jpg)
You access it by pressing [ZOOM][6]. See the first screen.
![image1.jpg](https://www.dummies.com/wp-content/uploads/398847.image1.jpg)
This Zoom command is the best way to begin graphing. After graphing the function using ZStandard, you can, if necessary, use the Zoom In and Zoom Out commands to get a better idea of the nature of the graph.
ZDecimal zoom command on the TI-84 Plus
This command graphs your function in a preset viewing window where
![image2.jpg](https://www.dummies.com/wp-content/uploads/398848.image2.jpg)
The ZDecimal command is accessed by pressing [ZOOM][4].
When you trace a function graphed in a ZDecimal window, the x-coordinate of the Trace cursor will be a multiple of 0.1.
ZTrig zoom command on the TI-84 Plus
This command, which is most useful when graphing trigonometric functions, graphs your function in a preset viewing window where
![image3.jpg](https://www.dummies.com/wp-content/uploads/398849.image3.jpg)
It also sets the tick marks on the x-axis to multiples of π/2. You access ZTrig by pressing [ZOOM][7]. See the second screen.
When you trace a function graphed in a ZTrig window, the x-coordinate of the Trace cursor will be a multiple of π/24.
ZQuadrant1 zoom command on the TI-84 Plus
This command graphs your function in a preset viewing window where
![image4.jpg](https://www.dummies.com/wp-content/uploads/398850.image4.jpg)
Of course, only Quadrant I can be viewed in this window. It is accessed by pressing [ZOOM][ALPHA][MATH], or by pressing [ZOOM] and using the up-arrow key to scroll to ZQuadrant1. See the third screen.
When you trace a function graphed in a ZQuadrant1 window, the x-coordinate of the Trace cursor will be a multiple of 0.1.