How do you set program code in aux on a RCA410rs universal remote?

To set program code in AUX mode on an RCA 410RS universal remote, first, turn on the device you want to control (like a TV or DVD player). Press and hold the "AUX" button until the indicator light turns on, then release the button. Next, enter the appropriate three-digit code for your device; the indicator light will turn off if the code is accepted. If it doesn’t work, repeat the process with the next code listed for your device brand until you find the correct one.