Check out Tiago's post on The Godfather Notebook. Elliot told me to check it out because of this image. The director would cut out pages from the book into a 3 ring binder, and leave plenty of rooms in the margins. He would take notes to help paint how scenes would unfold: "HIT HARD AND BLOODY." Or by highlighting "frozen fork," maybe that indicates a quick image to flash.
It shows the value of the margins. Open space lets you re-interpret what's in the text. This is how I work through drafts in writing. I paste an essay into Miro, start drawing shapes within and outside of the text, and then connect all the dots. It's cool that this happened in a physical binder, but a digital mind map makes this so much more doable, and easier to systematize.