What must a developer set to allow a user to modify an attribute in the...

To allow a user to modify an attribute in the Cart's configuration window in Salesforce Industries CPQ, a developer must set the "Run-time Configurable property" for that attribute. This property enables the attribute to be edited during the configuration process within the cart, providing flexibility to the end-user to customize product specifications or choices directly from the cart interface. This is crucial for scenarios where product configurations need final adjustments before completing the order.