Thanks for the feedback. I’m glad you like the style. Here are my thoughts:
The manuals were designed for screens because of environmental and cost reasons. Because of this, I decided to use a black background to reduce the energy needed to display them. It also mirrors the white on black design of the circuit boards. That being said, I am more than happy to create a more printer-friendly version so you and others with similar requirements can access the information in a comfortable way. Unfortunately, this isn’t a 5-minute job, so I will have to put it on the list of things to do.
edit: I made a very crude inverted version to tide you over. I will send it to you via email. Anyone else who wants a copy, let me know via firstname.lastname@example.org
Now, back to my holiday 🙂