Adjust display gap on Macbook/Pro

Bear with me here

My question is simply this: somewhere I read something that I thought was about adjusting the macbook pros screen hinge by screwing a specific screw. The way I saw it, that would adjust the angle, and possibly correct, for example, a slight tilt and uneven gap when the display is closed.

I could be 100% wrong, I just want to know if anybody knows what I'm talking about.