End features act as a place holder for future connections to the run. It is located at the end of a run, where a port exists on a part that is managed by the run. When an end feature is connected to a run, it is removed and replaced with another feature, based on the nature of the addition to the run. An end feature represents either end of a physical duct run. When you change a cross section, the software automatically inserts a transition feature. Also, when you change routing direction, the software automatically inserts or changes the turn feature. You can type a value in the Angle box only if the specification is set for continuous angle type.