Split Mode (not FT-847, FRG-100 or VR-5000)
Where the rig supports it in hardware you can activate split mode by checking the Split checkbox. You will then receive on the current VFO's frequency and transmit on the alternate VFO's frequency.
Where the rig does not support split mode in hardware you can use split mode by using the Memory Grid with different receive and transmit frequencies defined. The program will then use the same VFO, but alternate between the two frequencies when you click the Transmit button on the screen.