Language is a particular kind of semiotic system, but there are also others like gesture, depiction and music. When the combine in communication, as they commonly do, we have polysemiotic communication. Examples are when we speak and gesture, as well as use facial expressions. Or when we combine these semiotic systems with depiction, either online while drawing (on the sand, or on a whiteboard), or offline in various media genres like advertisements. This theme studies how these semiotic systems combine and interact with one another, across different cultures, and media.