yo wrote:There used to be so many great tricks to fix drawings, like "cut ins"... where if you had that marker slip like Mike was talking about you would carefully "cut in" a clean section of paper and do that little section over.
I was told a long time ago, I think from a sculpture professor, who could have stolen the quote, that the mark of a great craftsperson is not how well they make an object but how well they cover their mistakes.
Also, I don't know if paper was expensive in the 60s, I don't think it would be, but it wasn't in the 80s and another professor taught me paper's cheap, 1 idea per page. And again, it there was an errant marker line, fix it. There is no Ctrl-z with analog.