Case IH AFS Pro 700 Software Operating Manual page 243

Press any range on the legend to access the numeric key-
pad.
Use the numeric keypad to enter a new value.
Press the "Enter" button on the keypad to save the value.
Press the "Close" button to exit the keypad without
changing the value.
If desired, continue editing range values until the legend
is complete.
Press the "OK" button to close the legend.
3 - SETUP
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