How do you change the driver side door on a 1985 Ford Mustang LX 5.0?

under the mirror, there is the bottom trim to the window. If you carefully lift that panel up under the mirror, you should find a screw. you need to unscrew that screw, and the mirror should come out. I've check all over the blasted place for this answer, and my daughters boyfriend who has the same type of car that I do, showed me. Good luck!! Karen ~ A 1985 Mustang owner