Line can be used in two styles. Firstly, lines can be analytic. As we observed previously, in Keith Haring’s Subway Drawing, the lines can be easily read and understood. The artist’s intention was to give sufficient information so that the viewer “got it.” Line is used for the purpose of defining shapes, as disegno esterno.


However there are lines in the picture, which do not define physical, concrete objects. Curved lines around arms and legs are free form. Their shapes are spontaneous. These are expressive lines, the second style of line. Rather than defining objects, they express movement, elation, and air currents. Lines around the human arms and legs suggest movement. Lines in front of the dog’s mouth suggest noise. Such lines are not bound by the naturalistic rules of disegno esterno. They are neither analytic nor do they define physical objects.