"Concept maps are another great way to record knowledge. It also incorporates keywords, shapes, and connectors to visualize concepts. The central topic goes at the center and related ideas are placed surrounding it. They are then connected by arrows that have a brief explanation (1-2 words) on them to explain the type of relationship between the two ideas."
"The Ultimate Guide to Visual Note-Taking for Students and Teachers" by Amanda Athuraliya via https://creately.com/blog/education/visual-note-taking/