In the Slide Size dialog box, select Portrait, then select OK. In the next dialog box, you can select Maximize to take full advantage of the space available, or you can select Ensure Fit to make sure …

On the Design tab, in the Customize group, click Slide Size. Click Custom Slide Size. Change the orientation for the slides to Portrait or Landscape. Note: You can also change the orientation of your …

To show portrait and landscape slides in the same presentation, use the workaround in this article.

When you change the slide size for a presentation, the size you choose only applies to that presentation. You can also change the orientation of all the slides in your presentation.

You can change the slide size and orientation, set the paper size for printed slides, and edit headers and footers from Page Setup in PowerPoint 2016 for Mac.

To set the page orientation for all of the slides in your presentation, on the Slide Master tab, select Slide Size > Custom Slide Size. Under Orientation, select the orientation you want.

Arrange slide content with different slide layouts to suit your taste and preference, or to improve the clarity and readability of the content. Select the slide that you want to change the layout for. Select …

In the Page Setup group, you can specify the number and layout of slides to print on each page, change the orientation of handouts, and set the slide size. You can use settings on all three menus— …

In the Page Setup group, you can specify the number and layout of slides to print on each page, change the orientation of handouts, and set the slide size. You can use settings on all three menus— …

Arrange slide content with different slide layouts to suit your taste and preference, or to improve the clarity and readability of the content. Select the slide that you want to change the layout for. Select …