Hi, Rick. I'm not 100% sure that I understand. Code coverage in the JetBrains IDEs is displayed for the editor in the left gutter:
It sounds like your co-worker is seeing what I'd expect. I'm not aware of a way to get it to show with highlighting of entire lines in the editor. If you were able to do that, I'd be very curious to know how you configured it to do so.
Or am I misunderstanding the situation? If so, please let me know and I'll try to answer the right question.
Regards,
Scott Wells