Thank you page background

How can you edit the thank you page background image in the 'new editor'?

Do you want to remove background image from thank you page? 

You can achieve that by injecting this CSS code to your form:

body.thankyou {

    background: none!important;

}

Inside of this guide you can find how to Inject custom CSS code to your form:

https://www.jotform.com/help/117-How-to-Inject-Custom-CSS-Codes 

This guide can also help you to set up your thank you page:

http://www.jotform.com/help/211-Setting-Up-the-Thank-You-Page 

Hope this will help. Let us know if you need further assistance.