Visual weight

Typestyles have weights, regular, bold, light, heavy. For example, 'window' is set in a regular weight and 'animal' is in a bold weight.

Pictures also have weight although it requires that the eye estimate these weights. For example, the window picture is lighter than the animal picture on the right. The window was drawn with a lighter drawing instrument and uses lighter color whereas the animal was painted with a thicker paint and uses darker colors.