## 8.4 Slide backgrounds

Slides are contained within a limited portion of the screen by default to allow them to fit any display and scale uniformly. You can apply full page backgrounds outside of the slide area by adding a data-background attribute to your slide header element. Four different types of backgrounds are supported: color, image, video, and iframe. Below are a few examples.

## CSS color background {data-background=#ff0000}

## Full size image background {data-background="background.jpeg"}

## Video background {data-background-video="background.mp4"}

## A background page {data-background-iframe="https://example.com"}

Backgrounds transition using a fade animation by default. This can be changed to a linear sliding transition by specifying the background-transition: slide. Alternatively, you can set data-background-transition on any slide with a background to override that specific transition.