A study in pattern and form. Related Concepts: Reticle: A network of fine lines, dots, cross hairs, or wires in the focal plane of an optical instrument's eyepiece - commonly used as precision pointers. Points, Lines and Planes: Specific visual elements (points, lines and planes) organized differently activate unique cognitive processes. They are used as indicators in conceptual representations such as architectural diagrams, musical notation, letters of the alphabet, mathematical equations and more. Each of the following are made up of the same fundamental visual elements - points, lines and planes organized differently - each achieves dramatically different cognitive responses: musical notation - sound architectural plan - space engineering diagram - structure letters of words on a page - narrative