Display actions are found in the Display menu or on the main toolbar.
The Clear Text action will clear any text (song or scripture) from the presentation display but keeps the current background displayed.
If you are playing a movie, it will stop the movie and replace it with the current background.
If you have just used Blackout, this action will display the current background.
The Blackout action clears any text (song or scripture) and any media items (including backgrounds and movies) and fades to black.
The Test Pattern action displays a pattern that can be used to help align your projector.
Display Action can be added to services by choosing Add Display Action from the service menu.