The types of line drawing are points (big points and small points), lines (extension of points), surfaces (gathering of points and thickening of lines), as well as straight lines, oblique lines, spirals, curves and combinations of points, lines and surfaces.

line drawing can also be called sketching. It describes the objects you see with a single line. It is a painting form that can not only depict the objects in detail, but also simply treat them artistically. Line drawing shows different artistic effects because of the different tools used. For a long time, line drawing teaching in senior high school has some limitations in form, tools and materials.

In fact, lines can be monochromatic or multicolored, and other colored lines can be added between lines or above lines, resulting in a rich color change. You can also use art pens or signature pens to sketch thicker lines or thinner lines, which is in sharp contrast with the rough lines sketched by soft pens such as writing brushes.