Where is the learn or smart button on LiftMaster garage door?

The Learn or Smart button on LiftMaster garage door opener is located on the motor unit that is mounted on ceiling of garage for chain and belt drive models, or on wall-mounted unit beside door for jackshaft models. For chain drive models like LiftMaster 8360W and belt drive models like 8355W, 84505, 84501, Learn button is on back or side panel of motor unit, near antenna wire that hangs down, near LED indicator light, and near logic board, typically square button that is yellow, purple, red, orange, or green depending on model and year, labeled Learn. For wall mount jackshaft models like 8500W, 98022, Learn button is on side or front panel of wall-mounted unit that mounts on wall beside garage door, near LED and adjustment buttons. To find Learn button, look on motor unit for colored square button, it may be under light cover on some older models, you may need to remove light lens to access. Learn button is also called Smart button on older LiftMaster and Chamberlain models. Color indicates technology generation, yellow for Security+ 2.0 MyQ current models. Press and release Learn button to enter programming mode, LED lights steady for 30 seconds. Consult manual for your specific model number for exact location, as location varies slightly by model.