We have an "Is Active" property for all drainage elements. Elements that have this property set to false are ignored by the hydraulics engine. This makes it easy to focus on a single network if your design file contains more than one, because you only get information on the active elements when you compute a scenario.

We need a simple way to select a network, perhaps by choosing an outfall, and adding the ability to make it active or inactive. The symbology of the elements also needs to change when this toggle is set.