Hello I got the definition below for an actor. That means the system cannot be an actor to itself. I was wondering what if the system is supposed to display certain elements on a screeen. In that case would the system be its own actor in the system? Probably not . Then how would I present that in a use case diagram ?
Actors: An actor is a person, organization, or external system that plays a role in one or more interactions with your system. Actors are drawn as stick figures. - See more at: http://www.agilemodeling.com/artifacts/useCaseDiagram.htm#sthash.1jE5S2CY.dpuf"