The "Process of Communication" attempts to codify the act of communication. That is taking an idea, transmitting that idea to an audience, and receiving it by the audience. Here is one of many diagrams that can be used to quickly summarize the act of communication:
How can we better encode messages so that metaphors and visual items are transmitted as part of the encoded message?
For example, if we put an image of a half-filled glass on a presentation slide discussing "ideas" meaning (put your thoughts here) is that part of the encoding?
What strategies are there to make sure imagery is correlated and understood strongly enough to be part of the encoded message?