.gallery-fullscreen-slideshow-item-wrapper{ position: realtive!important} .gallery-fullscreen-slideshow-item-wrapper:after{ content: " "; display: block; background-image: url(/s/watermark.png)!important; background-size: contain; position: absolute; width: 200px; height: 40px; left: .5rem; bottom: .5rem; opacity: .5 }