Well, one angle is to qualify the use of the term "literacy", as in "visual literacy". Here is an article about the movie Pacific Rim that pointed out how much of the story (or rather, backstory) was visually communicated to audiences via production and character design in ways that entirely whoosh over the head of most viewers focused on dialog and acting:

https://www.stormingtheivorytower.com/2013/07/the-visual-int...