The project explores essential graphic elements in an architectural drawing. The combination of architectural drawing and graphics yields new methods of reading the drawings. The drawings illustrate the concept, introduce the design techniques and demonstrate the programs. More importantly, the reading of the drawing echos the experience of the building. The paired drawing shows the repetition of the same graphic configuration and reveals different aspects that each drawing intends to focus on. The intention behind the invention of the DUO is to make emphasis through repetition, and to make dialogues between the pairs.