<p>I remember that when I took the November test, my proctor marked using a highlighter the last question we answered for each section. (when I say marked I mean just put a line next to the question number on our answer sheet)</p>
<p>My first question is: Is this a common procedure, I don't remember seeing this with the SAT II Subject tests</p>
<p>Second question: Marking the question on the answer sheet in highlighter, would that affect my score? Would the scanning machine pick that up and think it would be an answer?</p>
<p>Never heard of it before, but I doubt it'd affect your score. Notice how a highlighter is not a pencil... But to get around it, you could just skip random questions so you get to all of them.</p>