A tilt-corrected document image is obtained by performing image analysis processing on a scan image to detect a document area and performing extraction and tilt correction of a document image based on the detected document area. A repeat target area is set based on the obtained tilt-corrected document image. The number of repetitions in repeatedly laying out the repeat target area for each of a plurality of candidate sheet sizes is calculated, and a list screen showing the calculated numbers of repetitions for the respective plurality of candidate sheet sizes is displayed. A repeat layout-processed output image is generated by repeatedly laying out an image of the repeat target area within a sheet size specified by a user, and print processing is made executable.