To do that, disable the general background of your app and optionally disable the header background:
and
add the following css in the “advanced customization” section of your editor:
.pane {
background-image: url("https://i.imgur.com/jyeOuJh.jpg");
background-size: cover;
}
Obviously, you have to change the URL code “http://i.imgur.com/jyeOuJh.jpg” for your own.
To get the best result, choose an image with a portrait format.
Important information:
That modification changes all of yours features’ backgrounds.
