MS Word: Create page numbers at the top of the page in Word 2007

Select the Insert tab in the toolbar at the top of the screen. Then click on the Page Number button in the Header & Footer group. Select Top of Page from the popup menu. Then select a page number design from the list. You can scroll through the list and select the one that best matches your needs.

The Page Numbers should now appear in the header section.

By inserting page numbers, Word may overwrite your existing header section. So you may need to customize the header section. When you are finished, click on the "Close Header and Footer" button on the Design tab in the toolbar at the top of the screen.