To edit a footer in your PowerPoint slides and include citations or notes, you'll need to access the Header & Footer menu ...

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

Buried under a Serbian cornfield close to a coalmine, the well-preserved remains of a Roman legion's headquarters are being excavated by archaeologists who say its rural location makes it unique.