| A | B |
| line | The basis of all art |
| contour line | defines outer edges and shapes and forms within |
| descriptive line | a variety of lines used to make recognizable pictures |
| lines of sight | the lines along which people look |
| outline | a line that surrounds the shape-descriptive |
| abstract lines | lines that are expressive, they do not decribe |
| hatching | thin, closely spaced parallel lines |
| closure | tendency to complete partial forms or shapes where lines do not exist |
| crosshatching | hatching lines that cross |
| edge | one shape ends and another begins |
| implied line | lines that are not seen in the usual way; edges, closure & lines of sight |
| optical mixing | colors side by side that blend together |