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

Learn how to set a specific Zoom, how to adjust the Zoom Level& how to make the current slide fit the slide pane in PowerPoint.

You can change the background of your PowerPoint slides using the "Format Background" feature located in the "Design" tab.

Master the ability of changing themes in Google Slides and PowerPoint with simple steps. Make unique presentations and engage your audience.

They are displayed horizontally, with slide numbers starting from one, but there are features in PowerPoint that allow the user to change the slide’s size and orientation.