Important By default, PowerPoint slide layouts are set up for landscape orientation. PowerPoint supports either landscape or portrait slide orientation in one presentation, but not both in the same presentation.
To change the orientation of all slides in a presentation, do the following:
- On the File menu, click Page Setup.
- Under Orientation for Slides, select Portrait or Landscape, and then click OK.
- Save the presentation.
Note To display both portrait and landscape slides in what appears to be the same presentation, see the blog post A good old-fashioned workaround: Using portrait and landscape orientation in the same presentation.