You can add page numbers to your PowerPoint slideshow through the "Slide Master" page, which lets you edit your entire slideshow at once.

In PowerPoint 2010, page numbers are called "slide numbers." To remove slide numbers from an entire PowerPoint 2010 presentation or from a single slide, you must use the Slide Number tool.

How to Change Page Numbers on a PowerPoint 2007 Handout. Microsoft PowerPoint 2007 handouts are an ideal way to keep your message in front of your audience after broadcasting a presentation on the ...