Change radio display to show volts?

Go to the function menu (hold down function button for about 2 seconds) and look for LCD: This option lets you choose if you’d like to display the following on the LCD meter.

 Rotate the channel selector to select the different options.

The first option is to display the model name of the radio, the second option will show the DC voltage present at the power jack, and the third option will display the model name during receive and the voltage during transmit.