head
The head must seen as narrow as possible. The skull often a bit wide, will be shaved really shorty in the opposite way of the hairs growth. You begin by the throat, then the sides to finish with the skull itself. You can make variations of the angle  of cut of the clipper to adapt it  to the way in witch hairs are implanted. Shave small areas at once and evaluate the result. Be aware that if you cut too much, the hairs will take a long time to grow back. The skull will be shaved in a specific order: beguinning at the level of the inner side of the ears. You stop just behind  the eyebrows. Those are cut at the right length, wide apart with straights shears. The sides of the skull will be shaved from top to bottom towards the cheeks. Cheeks hairs are shorten step by step ( variation of length ) until you reach the muzzle. During the grooming of the head, always keep in mind the perfect grooming and check very often if you're in this way. Brush and comb often to make you checking on the fact that the shape is correct.