Abridged transcription of his talk about the different affordances of various media, especially books and screens. For the former, written text is foregrounded, whereas images are foregrounded for the latter.
D. Zühlke. Nutzergerechte Entwicklung von Mensch-Maschine-Systemen: Useware-Engineering für technische Systeme, chapter 7, Springer, Berlin, 2 edition, (2012)