Texas Instruments TI-83 PLUS - Manual (Page 113)

TI-83 Plus Function Graphing 110
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Float or 0123456789 (fixed) decimal mode affects displayed graph
coordinates.
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Radian or Degree angle mode affects interpretation of some functions.
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Connected or Dot plotting mode affects plotting of selected functions.
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Sequential or Simul graphing-order mode affects function plotting
when more than one function is selected.
Setting Modes from a Program
To set the graphing mode and other modes from a program, begin on a
blank line in the program editor and follow these steps.
1. Press z to display the mode settings.
2. Press † , ~ , | , and } to place the cursor on the mode that you
want to select.
3. Press Í to paste the mode name to the cursor location.
The mode is changed when the program is executed.