This document provides an introduction to principles of design for digital photography composition. It discusses odd numbers, lines, balance, framing, avoiding mergers, unity, variety, emphasis, rhythm and movement, symmetry and balance, pattern, repetition, and proportion. Key points include that odd numbers add visual interest; balance can be symmetrical or asymmetrical; framing draws attention to the center of interest; unity brings similar elements together; variety introduces contrast; emphasis makes one part dominant; rhythm creates the illusion of movement; symmetry balances visual forces; pattern uses repetition; and proportion relates sizes. An example photograph at the end illustrates multiple principles.