I have a file in postscript that has 1000 pages. I need to print it to a postscript compatible printer. The problem is that I need to insert into it a background that is a one page pdf file. I know the concept of “form” in the postscript language that is declared in the beginning of the postcript file and is loaded once in the printer so wherever in the rest of postcript file is referenced then printed. So with this way we avoid the bits of background in every page in postscript file and the big ripping time of the file in the printer. But I don’t know details about this technique and there is not much in the internet.