Query about spells display on Enemy Nameplates

Hi - Not sure if this is where I ask this but how do I get the spells an enemy pc or npc to display on their nameplate - used to be I’d see their name, mana bar or whatever and what spell they cast so I could know if it was interruptible or not.

I.E.
Name
Mana/Energy bar
Spell or Attack they are in the process of casting/doing