Add a background image behind the popup
1. From the Bouncer Dashboard page, scroll down to the Popup Background section and choose the Custom Image option.
2. Once the Custom Image options is selected, click the Choose File button and select and image that is at least 1024 pixels wide by 1024 pixels high. Bouncer will automatically scale to fit the boundaries of the containing space.Be sure to click the Save Changes button to view the result: