I followed the John Nelson video below to create symbology for trees on an antique map:
https://www.youtube.com/watch?v=sy3Rerl05yg
This looked great on ArcGIS Pro, but I was unable to find a way to use this symbology in ArcGIS Online. When I attempted to share the layer as a web layer the result had no symbology; the map was completely blank. Do you have any suggestions for creating a similar symbology in ArcGIS Online?