The incidence of change blindness when a cue is added to the scene that indicates which part of the scene has changed.

It is incidence of change blindness decreases when a cue is added to the scene that indicates which part of the scene has changed. Change blindness refers to a phenomenon in which large changes to the visual world go undetected if attention is not already focused on the objects or area in which the changes occurs.  

The answer is overmatching