The background of the mini-site that appears when you visit the server's domain in your web browser can be changed by modifying the page's CSS file, located at */usr/share/airtime/php/airtime_mvc/public/css/radio-page/radio-page.css*.
```
html {
background: url("img/background-testing-3.jpg") no-repeat center center fixed;
-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
overflow-y: auto;
}
```
Place the new background image in the */usr/share/airtime/public/css/radio-page/img/* folder and change the `background:` entry's URL to point to the new image. The new image should be at least 1280 x 720 in pixel size to avoid being blurry.