Hey Revenant. It depends on whether or not you're playing on the mobile version of UR. In the desktop version you can see your friend's name highlighted in red, as long as both of you are in the same room. If you play on your phone or device, stay in the same room and hope you see your friend's name in red too. It does work, SOMETIMES. It's just not consistent, as what most of the features of the UR app are.