The slide master stores information about the template such as which fonts, background design and color scheme you prefer. Formatting change or added clip art to the slide master will result in the updating of all other slides based on that master. To switch to the Slide Master in the new PowerPoint 2007 interface, do the following:
1. Select the View tab on the Ribbon.
2. Under the Presentation views group, select Slide Master.
An alternate method is to locate the icon for Normal view, down in the lower right corner, before the Zoom control. Hold down the Shift key and click the icon. To return to Normal view, select the icon again, without holding down the Shift key.