How to Edit Button Function in HT Model:
Connect the radio to the programming software.
Press and hold the lower PTT button, then power on the radio.
The radio will enter programming mode.
Select the "Read radio data from the radio" icon.
Select "General & Buttons" and click "Button."
Select the button to edit and click the OK button.
Click the "Write data to the radio" icon.
Remove the programming cable from the radio