Start with your radio on 1 channel you want to listen to.
Turn the radio to the off position.
Hold in the menu button and turn the radio on.
You should now see two channels listed stacked on top of each other.
Turn the selector knob to change the second channel.
Now the part if forget at the moment is you either hold the menu button or the button to the left of it and the PTT at the same time to switch between those two channels.
The one with "ACH" I believe in front of it is the channel you will xmit on.
Hope this helps..its really early, im not a morning person.