How do you switch your remote garage door opener from one door to the other?

You should be able to find the information in the door opener manual. It should be under change door codes. If you don't have the manual go on line and look up the manufacturer. Most companies have operation manuals on line.
You should be able to find the information in the door opener manual. It should be under change door codes. If you don't have the manual go on line and look up the manufacturer. Most companies have operation manuals on line.