Code Check for fast reference… I keep the CA, NEC and the other applicable editions.
.pdfs of CA Building Codes (I’ve cut them down/out as well, by selecting page ranges)
I use illustrations as David mentions, but don’t refer to them as the by the time I’m using them, I already am reporting a defect.
A lot of what we run into is repetitive stuff, I simply use the references if a curve is thrown @ me.
Like recently… I was looking at a Master Bedroom addition, the aluminum/annealed window that would provide egress was about 30" from the edge of the pool coping and less than 5 feet from the waters edge… how many defects were there? Had to look at it for a minute and go… hey!?