Open the hood and look at how the headlamps are mounted to the radiator core support/crossmember.  There should be at least one screw per headlight, usually a phillips head, that faces up, and one to the side.  Turning these screws will move the headlamp assembly to allow you to adjust the beams.

It is easiest to do this against a flat wall or closed garage door to get the beams to where you want them to be.

use a 1/4 inch socket or 1/4 inch screwdriver. there are 2 screws, on for up/down, on for left/right.