Changing the Design of a Presentation

If you want all of your presentation’s slides to have the same look and feel, you can save time and effort by using the Slide Master. With the Slide Master, you can format all your slides at once, or make other changes to the entire presentation. For example, you can change text formatting, such as size or color, or even add extra graphic elements.

Introduction to Microsoft Office v.X for Mac > Creating Presentations with PowerPoint > Changing the Design of a Presentation