In the attached UAF project, I have one operational performer performing a material exchange with another operational performer. I'm trying to figure out how to automatically color exchanges based on their exchange kind. This would make it easy to see the difference between material exchanges, energy exchanges, information exchanges, etc. I believe this will require a metachain for the property test within the legend but I can't figure out how to get to the operational exchanges and the exchangekind tag for the operational association between the performers. I can get to the ExchanageKind once I have the ElementType as shown in the table. Attached project created in 2022x.