To provide print results with correct intervals between copies within collated documents.

When a print mode in which a spool file manager 304 outputs a plurality of logical pages on one recording medium is designated, the logical pages within documents are compared with one another as to their drawing information; when the documents are determined to be collated documents that are to be printed in a plurality of copies, the logical pages within the documents spooled to a spool file 303 are compared with one another as to their drawing information to determine the number of pages which serves as the interval between copy units. According to the interval between the copy units, the process of transferring the drawing information to a printer 1500 in copy units is controlled.