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

You can add page numbers on Google Docs to any document. All you need to do is go into a document's Insert menu, which will ...

If the page numbers are disappearing in your Microsoft Word document, read this post to learn how to fix the issue. Word allows you to add numbers to each page in a document to know its exact length ...