Scene, Visibility of models and fiducials

I use Q3DC and Angle plane modules. First, I must choose scene for create the the plane or landmark but I don’t know how to create scene. Should I go to create this on the other modules before go to Q3DC or Angle plane?

Your scene will come from loading data files into Slicer. This can be as easy as clicking and dragging an appropriate file into Slicer.