Recently had work done to my headlights and after I put them back in I realized the alignment was off. I know where the adjustment knob is but how exactly to you adjust it.

 

I'm sure you will get your answer quite promptly with such a worthless subject title.

 

I used a ratchet on the bolt head, twas easier than trying with a long phillips head screwdriver. Just turn clockwise or counter-clockwise until the lights are back to factory. And that is not perfectly even.
111111111111111111111111111111111111111_______
Each bulb's cutoff pattern goes like this: ______/

(Easy now, ascii is not for pictures. The 1's are place holders since I can't remember what a space is in HTML. Use yer imagination. )

To align them correctly the left hand side of the pattern should line up with the right hand side of the driver's side bulb. Somewhat like:
1111111111111111midpoint11111__________
111111111_________|________/
________/