Fixed Parallax @ 35 yard Scopes?

[Garry]

For true simplicity, accuracy and optical quality, choose a fixed mag. fixed focus 'scope e.g. 6x40 or 7x50, parallaxed at your usual range, e.g. 30 yards for airguns, 100 plus for centrefire.

Would the JSR 6 x 32 PX Mini fulfill this criteria?

Am I right in thinking that a scope set for px at 30 yards would be aimed higher or lower via milldots at other distances? Or would the px have to be set again?

I understand that a scope hitting bullseyes at 30 yards means aiming higher or lower at other distances, but I don't understand how a px control comes into it.

My limited experience only involves using open sights as a frame of reference for this subject.

Thanks
Garry

[Garry]

Quick bump for the above questions, ta.