There is a black button on the underside of the Vue that you use to change the transmitter ID. IIRC, you push the button and hold until the LED flashes twice…then release the button, then depress the button in successive presses for the number you want to use for the ID. As an example, if you want to set the ID to 4 you would press the black button 4 times. I believe the LED will repeat the ID number back a few seconds after you finish, so verify it flashes 4 times. ID numbers can be any number between 1 and 6.
Then go to the console and drill down the menu’s until you get to the transmitter ID section and set it to listen to ID 4.
Be sure to read the Vue manual and verify the procedure.