A quick and sketchy drawing of a person’s head will also be called a portrait sketch. Moreover, in this case, you can only draw a person’s face, or you can depict his entire head with a neck and shoulders.
They also distinguish between sketches made from nature, from photography, from memory and invented. In the latter case, it will be a completely fantasy image that exists only in the head of the artist. In addition, a person’s face can be drawn in profile, full face or half turn.