When you design your documents, you should consider some categories of elements:
A. Textual elements: letters, numbers, and symbols
B. Spatial elements: spaces between textual elements as well as the size and location of textual and graphic elements
C. Graphic elements: tables, graphs, charts, diagrams, etc.
D. Typographic elements: type face, type size, type style, listing, underlining, shading, boxing, and color.