How should developers configure customized nodes for display in Actionable Relationship Center (ARC)?

To configure customized nodes for display in Actionable Relationship Center (ARC), developers should reference the FlexCard in the Display properties of the custom ARC relationship graph. AFlexCard is a tool that allows users to create custom user interfaces for displaying data from Salesforce or external systems using OmniScripts and Integration Procedures. A custom ARC relationship graph is a metadata type that defines the nodes and edgesof a custom relationship graph for ARC. By referencing the FlexCard in the Display properties of the custom ARC relationship graph, developers can customize the look and feel of the nodes and display data from various sources on them.