In this article, the author demonstrates that the semiotic model proposed by Charles Morris enables us to optimize our understanding of technical communication practices and provides a good point of inquiry. To illustrate this point, the author exemplifies the semiotic approaches by scholars in technical communication and elaborates Morris's model through analyzing visual and verbal elements of technical communication brochures from semantic, syntactic, and pragmatic levels. The discussion of semiotic approach reinforced by various examples illustrates that the semiotic model can be a tangible theoretical and practical tool to help students and practitioners study and analyze the use of visual and verbal elements in technical communication.