Locate the Learn button on the garage door opener motor unit
Press and release the Learn button
Within 30 seconds, press and hold the button on the LiftMaster remote you want to program
Release the remote button when the opener light blinks or you hear a click
Test the remote by pressing the programmed button
Repeat the steps for additional remotes if needed
If the remote does not work, repeat the process and make sure you are using the correct Learn button and timing