When you insert Slide Numbers on your slides, you may discover that the location of the Slide Number changes depending upon the active Theme of your slides. With some Themes, the Slide Number may be placed at the bottom right. With other Themes, it may be located at the top right. The location of the Slide Number may seem to be influenced by the Theme, and that’s almost true. However, a Theme is a larger concept. It’s only the Slide Master, a subset of your Theme that’s influencing the position of your Slide Numbers.
To learn more, choose your version of PowerPoint. If we do not have a tutorial for your version of PowerPoint, explore the version closest to the one you use.