If all page numbers are deleted, go to Insert > Header & Footer and select Other Pages on the left side. Go to Insert > Page Number and choose a number placement.

On the Insert tab, select Page Number, and then choose the location and style you want. If you don't want a page number to appear on the first page, select Different First Page. If you want …

Insert the current and total page numbers in an X of Y format into your document.

To use different page numbers or formats in different sections, create Page breaks and set page number for each.

In the Field names list, select Page, and then select OK. Go to Header & Footer > Page Number > Format Page Numbers, select the format you want, and then select OK.

If you want to add slide numbers, click the Slide tab, and then select the Slide number check box. If you want to add page numbers to notes, click the Notes and Handouts tab, and then select …

You can add or remove consecutive page numbers for an entire publication by working from a master page. If you have multiple master pages in your publication, you need to repeat these …

To show the document title, author's name, or some other text with the page number, or to hide the page number on the first page, start by using Insert > Header & Footer instead of Insert > …

You can insert page numbers for a worksheet in Page Layout view, where you can see them, or you can use the Page Layout > Page Setup dialog if you want to insert page numbers for more …

In the Field names list, select Page, and then select OK. Go to Header & Footer > Page Number > Format Page Numbers, select the format you want, and then select OK.