Word automatically formats text as a numbered list when you when you type a number and a period followed by a space: Word adds a tab and creates a ¼-inch hanging indent. (If the paragraphs already have hanging indents, the original settings are preserved.) The quickest way to create a custom numbered list is to change the formatting of an existing (or automatically created) list.
The above steps are the most basic way to add a very basic page number, but if you follow a few tricks then you could save yourself even more time and get the job done even faster. For one thing, the page number you’ve added is only for one page, and if you used that method you’d spend ages adding page numbers to the whole document. To add page numbers to all pages quickly and format them all equally, follow these steps: