I am working my way through Deborah Rockman's book (really good btw), and I think I understand most of the "Observational Drawing" chapter. Everything except for one thing. I'm not quite sure how to scale the sighting measurement you take on your sighting stick properly so that it measures out correctly on your paper. Taking a 1:1 sighting measurement (say, 1") and drawing that on the paper is pretty self explanatory, but what if I want to take that unit of measurement and make it bigger or smaller on my paper?
I assume I have to work with my chosen unit of measure and set some sort of increasing/decreasing ratio to it, but that seems like there is tons of room for error doing that.
Any help or tips? Thanks.