1
To begin, open a PowerPoint Presentation.
2
Click "Design"
3
Click the arrow next to "Slide Size" to open a drop down menu.
4
Click the Widescreen (16 ratio 9) button for a classic PowerPoint landscape presentation.
You can also select "Standard" or "Page Setup" to choose a specific size.
5
Click "Scale" to scale your content to fit your new dimensions.
