On Sat, 28 Jan 2017 11:51:39 -0800, home owner wrote:

I posted the wrong model number. Under the front light cover, the Model
is 13561.

I've folded the antenna wire in half but the garage opener still
operates when the remote control is more than 200 feet away.

I then coiled the antenna wire but the opener still operates when the
remote control is more than 200 feet away.

What do I need to do so the opener operates only when the remote is
within 100 feet?

1. Find a measuring device and mark a spot 100 feet from the garage.

2. Sink a pole in the ground at that spot.

3. Nail the remote to the pole.

4. Problem solved.