RmlUi/Samples/tutorial/tutorial_drag/data/tutorial.rcss

/* Hide the window icon. */
div#title_bar div#icon
{
    display: none;
}

icon
{
    /* The icons are floated left so they appear left-to-right. */
    float: left;
    
    /* The padding is added to push the text down to the bottom of the element. The inner dimensions plus the
       padding come to 100px square. */
    width: 80px;
    height: 40px;
    padding: 60px 10px 0px 10px;
    margin: 10px;
    
    decorator: image( ../../../assets/present.tga 0px 0px 100px 100px );
    
    font-size: 12px;
    text-align: center;
    text-shadow: 1px 1px black;
}