Actually, the addon is designing specs players in PvP (Arms, muti, elem) and displays it as an icon on the frame of goal. Unfortunately, only works on classic frames. Until then, until the spec is not specified, displays a little icon with a symbol of class, once the addon was able to determine the spec, the icon grows and changes to that which denotes the spec.
(sorry for bad english)
Download: Filebeam - Beam up that File Scottie!
Credits:
Ainy