The Slide Master and Edit Master Tabs in PowerPoint 2013
When you switch to Slide Master View in PowerPoint 2013, an entirely new tab appears on the Ribbon. This new tab is appropriately called Slide Master.
Here’s a quick overview of each group on this tab and the controls found in them:
Edit Master: The controls in this group let you edit the Slide Master. You can use the Insert Slide Master button to create a new Slide Master, or you can use the Insert Layout button to add a new layout to an existing Master. You can also use the Delete and Rename buttons to delete or rename Masters or layouts.
Master Layout: The controls in this group let you edit a layout by adding or removing placeholders, the title, and footer elements.
Edit Theme: The controls in this group let you apply a theme to a Master or a layout.
Background: The controls in this group let you set the background for a Master or a layout.
Page Setup: The control in this group lets you change the orientation for a page. (Unfortunately, PowerPoint doesn’t allow you to have Masters with different orientations in a single presentation. When you change the orientation of a Slide Master or a layout, the orientation of all Masters and layouts in the presentation is changed.)
Size: The control in this group lets you select Standard, Widescreen, or a custom slide size.
Close: This group contains a Close Master View button that returns you to Normal View.