you need to use an equipment which called "Headlight adjuster" to reset your car light beams to "Zero".
then park your car with a disteance between 4m~5m to do the adjustment.
you will not get the proper adjustment without using the "Headlight adjuster" device.
Some people said that they can adjust the headlight manually without using any equipment. But it is not the standard way, and all based on the his/her personal experience ONLY.
I only do the job by follow the ADR standard because it is standard and safety.