Gradient Fill in PowerPoint Backgrounds
In PowerPoint you can fill the background with gradient colors.
By using gradient colors you can make awesome backgrounds easily just combining a few colors and resulting in a great background design. You can configure the background from an existing preset or make your own gradient.
To configure the gradient background in your slides you can right click over the background and click on Format Background, or if you want to change the background for all the slides then you can go to View and then Slide Master and follow the same actions over the master background.
Under Format Background dialog you can select the fill option. Make sure to choose Gradient Fill and then a list of presents will appear and also the type, direction and gradient stops, which are useful to customize the gradient background style. You can also configure the transparent for each stop and the brightness.