Crayon is a dry media similar to chalk but with a wetter feel that prevents powdering. The tool has infinite pigment loading. As applied by the Crayon tool , its dry pigment tends to penetrate the canvas texture proportional to the pressure with which you apply it. This is due to PaintShop Pro mimicking a solid tool head. The pigment leaves a slightly waxy volume that can smear for a short distance as it is painted over. Crayons do not have a bristle component to the stroke, instead presenting a flat or angled tool surface. The body of the stroke tends to have a fall-off and break up affected strongly by the canvas texture. However, crayon pigment is less transparent than chalk and does not powder.
Crayon is a little more shiny than pastel, smears itself slightly less, but does apply a tiny amount of matter to the canvas and can smooth over bumps if used repeatedly. This is because the volume that is laid down is viscous enough to fill dents but also dense enough to prevent large-range smearing.