My two cents to add. Dont use a highlighter. Underline with a pen. Especially a good ink rich black pen. Not a cheap bic pen. Too many highlights annoy the hell

My two cents to add. Dont use a highlighter. Underline with a pen. Especially a good ink rich black pen. Not a cheap bic pen. Too many highlights annoy the hell out of the eyes. At least to me. And the older I get, the more it frustrates my vision and focus. Nice clean black lines looks more elegant in the long term compared to highlighter.