Dang been a while since I posted here. but anyway.
On the hinge of the screen door the inside edge there should be some screws. with some help from another person loosen just enough to slightly move the door and make your adjustments. It is kinda tight in there so if you have a small screwdriver that would be great.
I really dont remember how many there are or what kind of head are on them. but I do remember how to adjust them. I did a few of them in my time at WRV.
By your avatar (pic under your screen name) looks like your coach is in station 6 which would be where they install the slide outs, retracable front bumper and what a coinsidence the front door.