A printing system for enlarging/printing each document page by using a plurality of print sheets or for printing each page of a document upon superimposing a pattern on each page includes, in a printer driver which supplies print data to a printer, a user interface driver including a pattern setting unit which designates the number of parts divided in enlarging/printing each document page by using a plurality of printing sheets, and a feature of a pattern on a margin to paste up which is set on one side of at least one of the printing sheets and a pattern page creating unit which draws a page including only the pattern and inserting the pattern page prior to document print data, print processor functioning as a pattern page combining unit which creates a composite page by superimposing each page of the document print data and the pattern page, and a printer graphics driver functioning as an image creating unit which creates bitmap data of the composite page and supplies the data to a printing unit.