You would like to change the background image of your sign-up widget to better reflect your brand. Follow these steps below.

Quick start

Currently, this can only be changed through custom CSS. While we don't offer any specific custom CSS guidance, we do offer the option for event organisers to enter their own code by going to Event Setup > Settings > Branding & Content > Custom CSS.
Do note, we don't recommend you do this unless you've had experience with custom CSS, since errors in code could result in unexpected changes to your summit site. 

For example, to change the background of your sign-up widget to this picture,
Enter this code in the box:
.footer-top-promotion-bar { background-image: url('') !important; }