Page Setup... is a command in the File menu that opens a dialog box with which you can set certain characteristics that apply to your entire document (not just selected portions, such as a word or a paragraph).
You use it to set page margins for the document and to place headers, footers, and footnotes relative to the document body.
You use it to indicate what the page numbers are (usually the first page is Page 1, but you can change that).
You also use Page Setup to tell the word processor what printer
to use, what size of paper to expect, and whether to print the document in Portrait
mode (paper is taller than it is wide) or in Landscape mode (paper is wider than it
is tall).
Copyright 1996 by the Curators of the University of Missouri