#layerTree {
  border: solid black 2px;
  margin: 5px;
  width: 512px;
}
#layerTree div {
  position: relative;
  border: solid black 1px;
  padding: 8px;
}
#layerTree button.up {
  position: absolute;
  right: 50px;
}
#layerTree button.down {
  position: absolute;
  right: 10px;
}