Can't figure out how to add new unique symbol

Discussion created by MatthewK on Mar 7, 2014
Latest reply on Mar 18, 2014 by Carmie
I've created a map and used "unique symbols" to create the great!  However, I need to add another value to the symbology and I can't find a way to do it using the map viewer, However, I was able to do it in ArcGIS Explorer online.

Am I missing something?  Is it possible to do this using the map viewer?