Any slide in a PowerPoint presentation is always based on one of the available Slide Layouts (we call these just Layouts for the rest of this tutorial). You can either choose a layout when you add a new slide — or even change the layout of your existing slides. These available layouts seem to cover most types of slides — still, you may sometimes want to create a new layout based on your individual requirements.
Learn how to duplicate, rename, and edit slide layouts in PowerPoint 2011 for Mac.

