I think a great addition to ArcView to aid with presentation would be the ability to allow graduated transparency within all the symbology options.
For example when you are representing quantities through graduated symbols by site location the symbol should gradually become transparent towards the outer edge.
As the sites build up together on the map the merging sites would begin to indicate hotspot of e.g. carbon savings that have been recorded.
At the moment you can only create this affect by using a multiple ring buffer which is fine if you’re only dealing with a relatively small amount of locations. However, if you’re dealing with sites nationwide this becomes virtually impossible.
