Hi Jana,
Well, the simplest way to do this would be with CSS. So upload your image to the Media Library then copy the link to the image (edit the image and the address is next to “Copy Link”. You can then use this CSS by replacing the image address with one that I have used here as an example and pasting the code into “Customiser – Additional CSS”.
footer {
background-image: url("https://fbw-wandlitz.info/wp-content/uploads/2019/07/Oliver-Borchert-Buergermeisterwahl-2019-Wandlitz-stark.jpg");
background-size: cover;
background-position: center center;
}
The “background-size: cover” tells the browser to increase or decrease the size of the image so it will proportionally fit the footer area. The “background-position: center center” tells the browser to centre it.
If you think people would prefer this to be an option in the plugin, let us know and we’ll add it to our “to do” list.
Oliver