To see it for KILLS is easy, just click “Debuffs” then click “Enemies” and you can see the uptime. How do we see it for wipes? So that we can verify that the boss actually had it on him?
I understand that the cast wont show. But Hunter’s Mark is a debuff that causes the boss to take increased damage so it seems strange it doesn’t show on logs unless it’s a kill when other debuffs that cause a boss to take increased damage do.