I have data that I want to symbolize as Unclassed Colors, but I want to include additional values/information in the legend beyond just the min/max. I am looking to do something similar to what I am seeing in this living atlas layer: https://www.arcgis.com/home/item.html?id=0e468b75bca545ee8dc4b039cbb5aff6
In ArcGIS Pro, I can set the upper and lower values to the same labels as seen here, but where I am stuck is trying to figure out how to set additional values- like how this living atlas layer has the national average:
I dug into the service a bit here: https://services.arcgis.com/P3ePLMYs2RVChkJx/arcgis/rest/services/ACS_Poverty_by_Age_Boundaries/Feat...
and found this regarding the "stops" which specifies the national average:
Looking into a "renderer" led me to this documentation: https://developers.arcgis.com/rest/services-reference/enterprise/generate-renderer.htm
I am wondering if this is the answer to my question, but not able to confirm as I do not have a ArcGIS Developers license- OR possibly this is much simpler than I a making it out to be and I am overlooking something.
Is there a way to configure additional values like this within ArcGIS Pro?