[Theme: Divi] Use CSS as background

Could you please share me your site URL where you want to add it so that i can help you?

Ofcourse ??
https://koffid.nl/gfx

Thank you for sharing your site URL.

I checked it and found you have added the letter div in wrong place. You should add it such a way that the page-container div will be inside it as shown below.

<div class="letter">
   <div id="page-container">
        ....
   </div>
</div>

Thanks, it’s working now ??

You are most welcome ??