The document discusses various principles of design including symmetry, proportion, emphasis, rhythm, and unity. Symmetry refers to both sides of a design being equal or balanced. Proportion examines how individual parts of a design relate to each other and the whole based on ratios like 3:5 for the average body. Emphasis is used to draw attention to certain features while de-emphasizing others. There are three types of rhythm - repetition, radiation, and progression. Unity creates a cohesive design where all elements complement each other.