Creating the Multifeed Line Display Layer

Add the RxLineDisplay layer to the Responder_Cached group in your map.
Right-click RxLineDisplay and select Properties.
Select the Symbology tab.
Type Multifeed in the Label appearing next to the symbol in the Table of Contents field.
Click the line symbol to modify the color and size used to display it on the map.
Select the Definition Query tab.
Enter the following in the Definition Query field: RXFEEDERID like ('%,%') (using the field that is assigned to the RXFEEDERID model name).
Click OK to save changes in the Layer Properties.