bundsteg allows you to add inner margins to pdfs in order to make space for stitching pages together. The little scriptlet additionally features printing multiple pages onto one by invoking pdfnup and rotating pages individually, based on a modulo or a page range before any other operation will be executed. Margins are at first removed fully in order to re-add margins at a later time on so that your pages or slides can be scaled to the maximal possible free space.