In PowerPoint, slides are sized for an onscreen slide show. They are displayed horizontally, with slide numbers starting from one, but there are features in PowerPoint that allow the user to change ...

You can change the size of a slide in your PowerPoint presentation through the "Design" menu. Microsoft PowerPoint allows you to change slide sizes on the Windows PC, Apple MacOS, and web-based apps.

You can now create and edit PowerPoint slides in a vertical orientation on iPhones and iPads. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.