[wildermuthn]

Maybe the article covers this, but there an ancient memory technique (still used today) of “places and things”, also known as a memory palace. You put objects into spaces in your mind, then walk through that imaginary space to remember things. Turns out that humans are much better at remembering things when the context is spatial. Makes sense that this would apply to reading physical books.

[bayindirh]

This is why we have terms like "On the other hand", "in this case", and similar. These are used in memory palace mostly.

[kayodelycaon]

I almost exclusively use spatial memory for programming. It's basically a flowchart I can zoom in or out of. A whole application or problem will be a forest I can walk through or fly above. Everything in a single context to avoid context switches.