Change the Orientation of PowerPoint 2007 Slides
PowerPoint slides are designed to fill the monitor, but a PowerPoint slide in portrait orientation can’t do that because monitors are in landscape style. PowerPoint puts black space on either side of the slide to fill the screen. Portrait-style slides look a little odd to people who are accustomed to seeing the standard landscape style, but portrait slides also open the door to creative opportunities. Portrait style is good for presenting graphics that are taller than they are wide. Showing a presentation in portrait style sets it apart from run-of-the-mill presentations.
Click the Design tab and use one of these techniques to change the orientation of the slides in your presentation:
Click the Slide Orientation button and choose Portrait or Landscape on the drop-down menu.
Click the Page Setup button and, in the Page Setup dialog box, select the Portrait or Landscape option button under Slides.
Orientation commands apply to all the slides in a presentation. You can’t mix and match portrait- and landscape-style slides.