I have several A4 PDF documents which I would like (two into one) \"glue\" together into A3 format PDF document. So I will get from 2PDFs A4 a single one si
What you want to do is imposition. There are commercial tools to impose PDFs such as ARTS crackerjack and Quite imposing but they are pretty expensive (US$500), require a copy of acrobat professional and are overkill for imposing 2 A4 pages to an A3 sheet.