I use a magnifying glass to read those. Then sketch my own wiring diagram for the area I'm working on. Not that many wires. You could draw the whole thing in an hour or less on some printer paper (two of those together is 11 x 17) or use an online drawing app. But then again, I used to do that for a living.

Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn