The document discusses the four principles of design: balance, emphasis, rhythm, and unity. It provides examples of how to apply each principle when designing publications. Balance involves symmetrical or asymmetrical placement of elements. Emphasis draws the eye to key points using techniques like size, color or position. Rhythm uses repetition and variation of visual elements. Unity makes all parts seem cohesive through consistent use of elements like color, font and layout. The document also lists common design problems to avoid like trapped white space, whispering headlines and excessive formatting.