When you open PowerPoint, you’ll see some built-in themes and templates. A theme is a slide design that contains matching colors, fonts, and special effects like shadows, reflections, and more.
On the File tab of the Ribbon, select New, and then choose a theme.
PowerPoint shows you a preview of the theme, with four color variations to choose from on the right side.
Click Create, or pick a color variation and then click Create.
