| 摘要 |
A marker corresponding to an editing state at an arbitrary point in time of image data being edited is stored in memory. The image of an arbitrary editing state can be displayed by a user selecting the displayed marker. The original image data is not updated. When saving the image data file, the saved editing state at an arbitrary point of time can be saved as a single file together with the original image data. By selecting a plurality of markers, images corresponding to a plurality of processing states can be displayed simultaneously. A marker can be used to create a new image data file of a desired processing state, or a plurality of markers can be selected to create a plurality of new image data files. Image data can be displayed as thumbnail images, and thumbnail images and ordinary images can be concurrently displayed.
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