To provide an image output system which can produce a color proof accurately reproducing the final print by taking misalignment of the plate in a printed material into consideration, and to provide a controlling apparatus, an image output apparatus, an image output method, a program to execute the method, and a storage medium with the program stored thereon.

An operator designates a shift amount for each color plate in a shift amount designation unit 12. The image raster data for each color plate stored in a raster data storing unit 11 is shifted according to the above shift amount by a shifting unit 13. The image based on the image raster data subjected to the shifting process is displayed in a display unit 14. The image raster data subjected to the shifting process is sent to a DCP making apparatus 2 by the controlling unit 15 for the DCP making apparatus. An image based on the image raster data subjected to the shifting process is outputted as a color proof by the DCP making apparatus 2.