Programming extra buttons on GDO remotes
I have a Craftsman 1/2HP GDO model 139.5398511. It has the remotes with the blue buttons (Security+). The gates in our community just closed and I want to program the gate remote frequency to the 2nd or 3rd button on my GDO remote. I bet I could follow the directions in my manual if I could find it. Unfortunately, I can't find it.
If someone knows the procedure, I'll quit tearing my garage apart looking for the manual.