An animation on how to choose other headers and footers.
Page numbers are one type of header or footer. Now see what else is available by looking at the Header and Footer galleries. On the Insert tab, click Header or Footer right next to the Page Number button, and choose what you want. You can select header and footer styles that match, such as the Alphabet style. Note that some of these include a page number, so you wouldn't have to add that separately. Click Play to have a look.