The document discusses principles of design that are used in visual design fields. It defines principles like emphasis, balance, rhythm, harmony, and unity. It explains how emphasis draws attention to focal points through techniques like contrast, size, and placement. Balance arranges elements so no section feels heavier. Rhythm creates movement through repetition of elements with defined intervals. Harmony and unity relate all parts of a design to complement each other and create a sense of oneness. The principles work together to create effective visual compositions.