body.customtheme-infoscreen div.zoom-image-background {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  background: #666666ee;
  z-index: 2;
}
body.customtheme-infoscreen img.zoom-image {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: auto;
  height: auto;
  max-width: 95%;
  max-height: 95%;
  margin: auto;
  z-index: 3;
}