how do I adjust my headlights?

Back in the day, some owner's manuals told you how to DIY.

Typical instructions were to park 25 feet perpendicular from a vertical wall on flat level ground in dark or twilight. A diagram showed how many inches up from the ground and to the right of each center the hot spots of the right and left headlights should be.

Adjustment of the incandescent sealed beams was usually from the front of the light with a Phillips screwdriver. You knew if you had them too high or too far to the left as oncoming cars would flick their brights at you.

Not sure how the current crop of LED and other lights would work though.

Any idea where these adjustments are?

Youtube is your friend:

Perfect! Thank you!

Always best to google up your model year as these things change. A simple youtube video may be much easier to follow than the car manual. I've had a couple of misadventures which would not have happened had I checked the internet first.

You can get them pretty well adjusted thus: Park on a level surface, facing a white or light colored wall. You might be able to find a parking lot next to a light colored building, for example. Have the car facing that wall. Make a mark (chalk or something you can remove), at the same height as the midline of the headlamps. "Aim" the car (maybe by sighting along the side bodywork and measuring in) so that a line from a headlamp goes straight to that mark. (Remember that "high" and "low" beams are generally about the same brightness, just aimed higher or lower.) Turn on the headlamps, on low beam. The light patch from the one aimed at the mark should (a) be centered on the mark, left to right (b) have a pretty sharp cutoff on the top at the mark.

Now move the car, or make another mark, so the other headlamp is now aimed at this mark.

It is usually pretty easy to get close doing that: Perfection really wants professional equipment, but this will get you closer than most cars are that I meet when driving after dark. On many cars there is not a separate adjustment for high beams. On my Subys that do have separate adjustments, the owner's manual has diagrams that show how the two differ. So if you do the low beam as above, you can get the high beams pretty close also. I make it a habit when I drive up behind a vehicle with a somewhat flat rear, e.g. many delivery trucks, I always try to notice how my headlamps are hitting on it. If they are not at the same height I know there is a need for adjustment. I have several times noticed a shift in alignment that way, and fixed it when I got home, and it also makes clear when a bulb has burned out or some electrical problem has killed one of the lamps. Bob W

Interesting, I'm looking at doing exactly the same thing as the OP myself. I checked out that video too previously, but it seems to be relevant to cars from about 20 years ago than today, as even my 10 year old car's system seems to be a bit different.