The document discusses key principles of gestalt theory and design including: the whole being greater than the sum of its parts; unity created through selecting and arranging visual elements for coherence; and harmony resulting from orderly relationships between parts. It also addresses repetition creating rhythm, movement and pattern; balance through equalizing visual weight on both sides or carefully juggling differing weights; and using techniques like the rule of thirds, focal points, scale and cropping to direct attention and create emphasis within a design.