First open the battery cover.
You can use a coin and insert it into the slot located on the bottom end of the remote. Twist
the coin and remove the access cover to show the dip switch code and battery.
Now access the receiver in the gate operator or on the garage door opener. It will look like the picture below.
You will want to match all your remotes to the dip switches you set in the receiver.
That is all you have to do.