A data processing apparatus that processes image data of a moving image is disclosed. The data processing apparatus includes: acquiring means for acquiring variations representing degrees of change in the image data, in a unit of picture; display-type determining means for determining, on the basis of the variations, display types, which represent display methods in displaying pictures, in a unit of picture; and display control means for causing a display to display type information representing display types of pictures and position information representing a position of a picture designated by picture-designation operating means operated in designating a picture to be displayed.