You can adjust the open position using both the black button for open up movement and purple or yellow button for down close movement.
How to adjust liftmaster garage door travel.
This video details how to adjust the opener force and travel of the door.
This video demonstrates how to program the travel on a chamberlain garage door opener with a yellow learn button.
Door must reverse on contact with 1 1 2 3 8 cm high object or 2 x 4 laid flat on floor.
Sure the garage door opens far enough for your vehicle but not past the point where the bottom of the garage door is even with the header of the garage door opening.
How to program the travel limits for liftmaster chamberlain craftsman garage door opener with arrow type program buttons with a black button.
Adjusting these dials alters how far the garage door travels while closing and how much force in kilograms the motor uses.
After any adjustments are made the safety reversal system must be tested.