I found it interesting how he separates drawing, computing, and digital images. The concept of the drawing being additive and uneditable makes sense, but that a computer image is not only additive and uneditable is an implied but not always easily seen difference. It is not easily seen because we cannot make another iteration of a drawing as fast as we can make another iteration of a digital image. Sure, the plotter can make repeated drawings, but they are not actually all the same and they take time. You now have to take care into each edit or iteration, or allow for the mishaps and mistakes and unintentional parts to drive the work.
The chapter talks a lot from an architecture perspective. An example in that field is that people don’t sketch on paper as much anymore. But the definition of sketching and drafting as drawing has been blurred. This blur exists with plotting graphics tools as well: we can visualize a plot on a screen, and we can do our best to make that visualization accurate, but there must be an understanding of how the physical medium works as well to make it worthwhile. Otherwise, plots will look like they were just printed.