In ArcGIS Pro, when using Proportional Symbols, you can set the units and what it represents (e.g. "US feet" and "Radius" for a tree). This makes the symbology independent of zoom scale. What is the equivalent on ArcGIS Online? Right now I have a map with a tree layer that shows a cottonwood the size of the entire Des Moines metro area when I zoom out to the state of Iowa.
