Hello,
In your demo, you have a settings menu that slides out from the left
It is for DEMO purpose only. All the options in the sliding menu are available in the theme.
which has background pattern options.
You may change the background color or background image / pattern of Contango by following the simple steps,
Go to `Appearance > Background`
You can upload your favorite color, background image, background pattern by using the powerful options.
Thanks