How do I change my background?

Solid color background: 1. Go to Design on the first toolbar. 2. Click on the Background option located to the right. 3. Click on the Background styles option. 4. Drop the arrow and choose a color. 5. Click on Apply to All. Picture background: 1. Click on the Insert option. 2. Click on Select Picture... and open the location of the desired picture 3. Format the picture to fit the slide.