Hinterhaus Productions/Getty Images You can edit a footer in a PowerPoint presentation to include citations, notes, or disclaimers using a similar method to adding Microsoft Word footnotes. To edit the footer in your PowerPoint slides, you'll need to access the Header & Footer menu from the Insert tab. With the "Header & Footer" tool, you can make your footer appear on just one slide, every slide in your presentation, or even every slide except the title slide. Visit Business Insider's Tech Reference library for more stories. The ability to add footers in PowerPoint is useful for any number of reasons.