Activate the learning process specific to the universal remote. Consult the remote's owner's manual for the specific button presses to begin this sequence.
Place the garage door opener and universal remote so that the IR sender on the opener and the receiving sensor on one end of the universal are parallel to each other and no more than 3 inches apart.
Press the button on the universal remote that you wish to correspond to the main button used on the garage door opener.
After the "learning" light or indicator illuminates or flashes, press the corresponding button on the garage door opener for 2 seconds. Wait until the universal remote acknowledges the command prior to moving on.
Repeat the process for the other two buttons. You will have three separate buttons on the universal remote that correspond to the three on the garage door opener.