There are two bars running from the handle that release the door to be unlocked manually and there is also a button on it which moves the bars across to lock the door.
Unlocking garage door track.
Check to see if anything a shovel broom etc fell and is now stuck in the track that is causing it to be lodged.
Use a key padlock on the vertical track to prevent the door from being opened manually.
3 lock garage door vertical track.
There will be holes in the vertical track that can be used with a simple padlock.
The sliding bolt should automatically spring open.
You can also use the operating lever.
Garage doors get a lot of use which is one of the primary causes of the problem.
To lock it push out the sliding bolt.
Keep turning it until you hear a click.
Lodged garage door track.
In order to unlock your manually locked garage door you just need to turn the knob or large handle located in the middle of your door.
Garage doors like anything else with moving parts require periodic maintenance.
Locking and unlocking from the inside.
To open it up all you need to do is thread a coat hanger or hooked piece of wire through the top of the door and open the emergency latch which can also be done by the rope many emergency latches.
If the garage door vertical track is locked the door cannot be opened.
To unlock it push the release lever away from the track towards the center of the door.
A common problem with garage doors is that they go off track from time to time which can be a particularly annoying problem when the weather is bad or you are in a rush.