Is there an addon that highlights or otherwise indicates the direction a target is facing? I play a rogue, but my vision has been getting worse and I'm having a hard time knowing if I'm behind my target or not.
Well, given you play a rogue, you have abilities that can only be used from behind the target (i.e. backstab). As a half-measure you can use some addon to amplify the "you must be behind your target" error message they generate when you try to use them and fail due to position.