A plurality of individual objects is put together to a group of page type objects in a page type object producing unit. When a display timing and a deletion timing for the group of page type objects are input, a page change timing of each of the page type objects in the group is automatically set in a page change timing setting unit to display the page type objects with a dynamic image at equal intervals in a display period between the display timing and the deletion timing. Therefore, it is not required to input a display timing and a deletion timing for each of the individual objects for the purpose of editing a scenario in which the individual objects are assigned to frames of dynamic image to display the individual objects with the dynamic image, and a scenario editing operation can be easily performed. IMAGE
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