The document discusses key formal principles of design including unity and variety, balance, emphasis, scale and proportion, rhythm, and economy. It provides examples and ways to achieve each principle. Unity can be created through repetition, alignment, and continuity while variety is achieved through contrast, hybridity, and fragmentation. Balance can be symmetrical or asymmetrical. Emphasis is created through isolation, framing, pointing, and contrast. Scale relates to size while proportion relates to the size of parts. Rhythm can be flowing, increasing, or staccato. Economy aims for simplicity and essential elements. The document shows examples applying multiple principles together in compositions.