A multimedia program editing method enables a layout with a higher degree of freedom by simplified input operations. Available media materials and a plurality of predetermined frames are displayed. The user sets a current scenario time to a desired time by clicking on a desired one of a plurality of time control icons, and associates a desired material with one of the predetermined frames at the desired time by mouse operations. In response to the association of the desired material, information on the association is registered to a scenario to prepare for an instruction to present the desired material in one of said predetermined frames. Any attribute of one of the predetermined frames can be changed. If the user terminates the association by specifying the desired material and clicking on a predetermined icon, then the attribute of the one of the predetermined frames is restored to a state before the desired material was attached to the frame.