> Red implies that the deleted lines are more important than the added lines
I've never gotten that impression. I and my coworkers & classmates usually highlight text using the standard yellow highlighter, occasionally using other snazzy highlighter colours - red sometimes included, but usually not.
The associations that leak in from other domains are green=good/go, red=bad/stop. It's very easy to mentally remap the colours to the intuitive green=new, red=old.
I've never gotten that impression. I and my coworkers & classmates usually highlight text using the standard yellow highlighter, occasionally using other snazzy highlighter colours - red sometimes included, but usually not.
The associations that leak in from other domains are green=good/go, red=bad/stop. It's very easy to mentally remap the colours to the intuitive green=new, red=old.