Texas Instruments TI-83 PLUS - Manual (Page 125)

TI-83 Plus Function Graphing 122
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At Xres=8 , functions are evaluated and graphed at every eighth pixel
along the x-axis.
Tip: Small Xres values improve graph resolution but may cause the TI-83 Plus
to draw graphs more slowly.
Changing a Window Variable Value
To change a window variable value from the window editor, follow these
steps.
1. Press † or } to move the cursor to the window variable you want to
change.
2. Edit the value, which can be an expression.
•
Enter a new value, which clears the original value.
•
Move the cursor to a specific digit, and then edit it.
3. Press Í , † , or } . If you entered an expression, the TI-83 Plus
evaluates it. The new value is stored.
Note: Xmin < Xmax and Ymin < Ymax must be true in order to graph.