There's nothing in Word that lets you simply set this. You have to calculate
how to set the margins so that Word forces the page break where you want it.
9 pitch means 9 characters per inch. You'll need to experiment, and you'll
need to use a monospaced font such as Courier New. For tips on the rest, see http://sbarnhill.mvps.org/WordFAQs/BottomLine.htm