How to upload background image

choose that form and click "Edit Form"

2. Inside the form builder, I clicked the Designer icon

3. From there, we can add a background image using the "Background Image" section, but in my case, I will use a custom CSS code to make the background image fit the screen completely. Here's my custom CSS code

.jotform-form {

    background-image : url('http://www.jotform.com/uploads/forum/realestatecoach/1443036195sellback.png');

    background-size : 100% 100% !important;

    background-repeat : no-repeat;

    background-attachment : fixed;

}

I'm using the URL of the image above. I placed it under the CSS tab, here's a screencast that you can follow on how I made the change.  Change the URL to your image in either location: