Change the page orientation in PowerPoint between landscape and portrait
7/9/2019
PowerPoint slides are automatically set up in landscape (horizontal) layout
, but you can change the slide orientation to portrait (vertical) layout
..
- Select the Design tab:

- Near the right end, select Slide Size, and then click Custom Slide Size.

- 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 that your content fits on the vertical page.
See Also
Use portrait and landscape orientation in the same presentation
Change the size of your slides
Rotate a text box, shape, WordArt, or picture