Adjustment of Altimeter

Have someone who's done this before show you how. If you back the screw
out too far, the lock plate will fall off inside the altimeter. It's an
easy adjustment to make, if you've seen it done once!

Ron wrote:
Seems as if I remember when calibrating the altimeter there is a small
screw next to the adjustment knob that covered a mechanism allowing
one to adjust the hands relative to the barometric pressure. Does
anyone know where I can find instructions on this. I have searched the
Internet but am yet to find anything.

Thanks.....Ron