The document discusses several key principles of design including alignment, balance, contrast, emphasis, unity, rhythm/movement, repetition, and pattern. Alignment refers to how elements are positioned in relation to each other. Balance can be symmetrical, asymmetrical, or radial. Contrast creates visual interest through differences in size, orientation, tone, and direction. Emphasis draws attention to particular elements. Unity makes all parts of a design feel coherently connected. Rhythm is created through regular or varied repetition of elements. Repetition and pattern work together to make a design feel active and unified.