I'm working with a polygon layer in ArcMap (version 10.3) that's currently symbolized as graduated symbols (in this case, teal dots on the map). I'd like to set this layer as slightly transparent to see underlying layers, but when I set a transparent percentage under the Display tab in the layer properties, nothing happens. Anyone know if it's possible to set a transparency for this kind of symbology?
It seems that the graduated symbols symbology has other head-scratching properties, like the fact that it always draws as the top layer, even if it's buried in the TOC. See screenshot below of the layer in the TOC that shows transparency buy the actual layer in the map window is definitely not transparent.