Can I add a Background image?

Can I and if so, how, do I add a background image to the website?

 

Hello,

Paste this code in Custom CSS
Appearance > Theme Option > Styling Option > Custom CSS

Code:

 
body, html{
background: url(ENTER YOUR IMAGE ADDRESS HERE) no-repeat center center fixed;
-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
} 
.content_wrapper .page-content{
background:none;
} 

Thanks & Regards
Gourav Shrivastava