DTP is Page Design Four Basic Principals Contrast Avoid elements on the page that are merely similar.
Contrast is often the most important visual attraction on a page.
Repetition Repeat visual elements of the design throughout the piece. You can repeat color, shape, texture, spatial relationships, line thickness, sizes, etc. This helps develop the organization and strengthens the unity. Alignment Nothing should be placed on the page arbitrarily. Every element should have some visual component with another element on the page.