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.
There are two types of adjustable down limit on liftmaster garage openers.
How to program the travel limits for liftmaster chamberlain craftsman garage door opener with arrow type program buttons with a black button.
This video demonstrates how to program the travel on a chamberlain garage door opener with a yellow learn button.
Incorrect adjustment of garage door travel limits will interfere with proper operation of safety reversal system.
After any adjustments are made the safety reversal system must be tested.
Adjusting these dials alters how far the garage door travels while closing and how much force in kilograms the motor uses.
The travel distance limit setting and the downward force limit setting.