When creating a power point presentation, it is important to keep in mind the device on which we are going to project our presentation. Today, most devices comes with a screen resolution in widescreen format 16:9, they include Television sets, monitors, screen projectors, or any other devices used for showing slide presentations.
Microsoft PowerPoint allows us to specify the presentation format at the time we start preparing the presentation, giving us the option to save it in 4:3 format or widescreen format of 16:9.
To change the presentation format, just follow these simple steps.
Click on Design tab
Click on Page Setup
On the pop up menu you will have several options for slides to be sized based on presentation format,
You can choose, On-screen show (4:3) or On-screen show (16:9).