I started doing that during my undergrad degree in electrical engineering, along with some other changes to remove ambiguity in my handwriting. I wasted 20 min

I started doing that during my undergrad degree in electrical engineering, along with some other changes to remove ambiguity in my handwriting. I wasted 20 minutes on an exam because I confused a 1 and an ‘l’ in my own writing and didn’t want to do that again.