These are the steps to adjust the homepage background of your website step by step:
1) Click the HOMEPAGE tab.
2) Click the BACKGROUND DESIGN tab.
3) Choose from the following options under Background Type: Without Image, One Image, Changing Images, Video
4) Under Custom Design Settings, customise the following options: Minimum Homepage Height, Text Color, Background Color, and Opacity.
5) Click the LAYOUTS tab.
6) From the various styles presented, click the one you want to apply to your home page. It will automatically set your homepage to that style. You can then continue editing your site from there.