If you find yourself inside your garage and need to open the door manually, perhaps due to a power outage or malfunctioning opener, follow these steps:
Ensure the Door is Closed:
Confirm that the garage door is in the down (closed) position before proceeding. Attempting to disengage the opener while the door is open can be hazardous.
Locate the Emergency Release ... https://justgaragedoor.com/what-happens-if-i-am-stuck-inside-my-garage-3/