The document discusses the history and techniques of drawing. It covers dry media like metalpoint, chalk, charcoal and graphite used by artists from the Renaissance like Leonardo da Vinci. It also discusses liquid media like pen and ink, wash and brush. Examples are given of works that demonstrate techniques like hatching with metalpoint, building up layers with pastels, and varying line width with calligraphy brushes. The document examines how drawing has been used as a creative process as well as a finished artwork throughout history.