EAF focuses on mass CGI animation scenarios, when there are too many objects to keep track of, using tools like Optical Flares. Even on a CGI scene featuring just a few light-emitting objects, EAF could be sufficient for most scenarios.

EAF uses the material name of that face to add flares to all parts in the scene using that material. So you'd better know the material shader's name in advance. When you hover over a face, Blender will show you the material name using that face. If the face is really small in the Compositor, Blender might show you several different material names as you slowly move your mouse over that face. When the name is right, click it.