This document outlines 12 principles of multimedia design according to Jose Claro Miguel Perez. The principles are: coherence, signaling, redundancy, spatial contiguity, temporal contiguity, segmenting, pre-training, modality, multimedia, personalization, voice, and image. Each principle is explained through its statement, general idea, and reasoning. The principles aim to help people learn better from multimedia by excluding extraneous elements, highlighting essential information, integrating words and pictures, and designing in a way that considers human cognitive architecture.