Hi,

You can do that by un-check on Customize > General Options > "Enable Body Boxed" and add more this code to Customize > Custom CSS:

.wrapper-boxed, .wrapper-boxed.enable-boxed{ background-color: transparent; }

But, when you do that, your site will very very hard to read. So, I recommend you don't do that.

Best Regards,

PenciDesign