You can do the vertical setting without a setter. But you need a bit of maths.
The setting information shown on the lamps or label, is a percentage. I think the value might be 1.3% but the principal is the same if the number is wrong. It works like this: the beam descends by 1.3%. So measure the height of the beam cutoff a distance from the lamp. Measure it again 1 metre further away, and it should be 1.3% that is 13mm lower. Obviously that's a small amount so double the distance and double the drop, and so on. Don't start too close or the pattern isn't clear.
It doesn't matter which point of the beam you choose (though dipped gives you a cutoff that you can see clearly) so long as you use the same for each measurement.