A time-varying image editing program for use in a computer of a time-varying image editing apparatus for editing a time-varying image by using prescription data including a parameter that prescribes a condition of an object in the time-varying image, the time-varying image editing program causing the computer to function as:
- an extracting section for extracting, from the prescription data, a varying parameter that regards a change in the condition of the object in the time-varying image;
- and
- a modifying section for modifying the thus extracted varying parameter in accordance with a user instruction, and updating the prescription data by using the thus modified varying parameter.