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

Slides contain placeholders for text, tables, images and videos. We discuss how to change, insert or delete a slide in PowerPoint.

If you need to tweak the theme on every slide and your presentation has countless slides, you might want to create a Design preset or theme in PowerPoint. This will help you apply the same design ...