Kenwood TM-D710G Crossband Repeat Settings

Repeater functions. Crossband repeat. See how all those options make the radio act. See how in the RT Systems programmer you set this option to get the functionality that you're looking for.
Remember, to engage Crossband repeat, you power off the radio then hold the third button from the left of those buttons at the bottom of the radio's display. When the radio powers on with this key sequency, it will be in Crossband repeat mode.
Also, many other functions of the radio will keep it from going into crossband repeat mode. I was playing with APRS on the radio and believe that is one of them... the radio just cannot do those two at the same time. So be aware that you may need to turn something off before you can turn this on.