How do you use the ts-rc411 the set button?

To use the set button on the ts-rc411 remote control, first ensure the device you want to program is powered on. Press and hold the "Set" button until the indicator light turns on, then release the button. Next, press the corresponding device button (like TV or DVD) for the device you want to control, and the indicator light will blink and turn off. Finally, enter the appropriate code for your device, and if successful, the indicator light will turn off; if not, repeat the process with a different code.