Construction demo – how to remove the boxed style?

maybe I am just dumb today, but I would like to know how to eliminate the boxed frame style for the Construction demo.

and by boxed, I mean the frame or padding around the border of the entire site. I want the slideshow area to be full width. but it isnt clear to me on how to adjust this in the TD composer.

thanks in advance.

I found a way to resolve this, but I dont know if there is a better way without without having to use custom code. Not sure if this is attainable using the composer or not.

I added this to custom css:

#td-outer-wrap {
margin: 0px;
}