Just in time for the fall term and its heavy load of papers, here are some lesser-known proofreader’s marks. Like students of The Little Professor, from whom I cribbed the link, I could benefit from the “remove permanently from your lexicon” symbol. (It occurs to me that “lexicon” tops the list of overused words in my lexicon. Whoa — how meta.)
macbebekin.wordpress.com 
I’ve learned a new slew of these marks in German which are of course all very logical. I love proofreader’s marks, call me virgo.