1. Line is one of the basic elements of design and can convey mood, feeling, and motion. It is created by the movement of a point and has infinite variety.
2. There are three types of line: actual, implied, and psychic. Actual lines are visible, implied lines connect points the eye follows, and psychic lines are created by the placement of objects.
3. The direction, weight, and quality of lines can influence the composition and how viewers perceive the mood, motion, and meaning of an artwork. Line is a tool artists can manipulate to guide attention and depict form, value, and themes in a piece.