Update Slide Background
On the desired slide, look for the Background button underneath the slide’s title. There are three options: image, video or color.
Choose a new background if there already is one by clicking on the little photo preview or the little green photo button. This will open your media gallery. The image will automatically fill the entire photo area. The photo can be re-positioned the same way as listed above.
It’s likely this will not be used.
Click the color preview area. A color popup will appear. There are pre-programmed colors available. You are also able to find a specific color by dragging the white dot around the color area and using the slider to the right.