download addon details!
disable or delete all sub addons of details besides details itself. else you will get frames loaded you have to accept and they will hinder you normal gameplay.
now you can type /score or /score me.

/score opens a menu of the first dps players visible on screen. unvisible actors are sadly not accessible. there is a setting to decrease the statusbar height  but i didnt find the api for it in details yet.
up and down arrow you select an actor.
then u can press: T for total dmg. D for dps. i for dmg in or taken. c for the class.

with /score me you open a more detailed dmg breakdown for yourself.
there u can press numbers 0-9 to get the spell by order of magnitude.


for live dps feedback type /bsdps.