1. To set a page background, click the Settings icon in the right-hand side of the editor, so you can then apply any of the preset styles.
2. To upload an image as a background, click Background and choose your preferred Background Type from the given choices: Color, Image, HTML5 Video, or YouTube Video.
3. Follow the next steps that show up after you make your selection. For example, if you selected Image, then in the next step, you will be prompted to Upload Image. Wait for the upload to finish, and you're done.