Change the background image

Good evening!
Tell me, please, how to change the background image and fonts in the theme Glass?

Hi!
To change the background you have to edit the following code in the style.css file:

html {
	background:url(images/back.jpg) top fixed no-repeat;
    -o-background-size: 100%;
    -webkit-background-size: 100%; 
	-moz-background-size: 100%; 
    background-size: 100%;
	background-color:#427197;
}

As for fonts and all the other customizations, there are several css files: style.css located in the directory of the theme and the others inside /css folder. Inspecting the page you will be able to determine the line and the file you have to edit.
We don't provide such kind of services.

That would be better served as a Customize feature don't you think?

To implement a unified mechanism of background setting is technically complicated task. We provide you a huge choice of versatile themes with different backgrounds which are completely free. Just choose the theme that suits you best and customize all the other options according to your preferences.