Size diffuser runout to match diffuser neck size: Sets whether the runout to a diffuser is sized based upon the airflow in the system or the diffuser neck size.
Default flex length: Sets the maximum length of flex duct used to make a diffuser connection.
Damper far from diffuser: Sets where balancing dampers are placed along ductwork.
Ceiling Connection: Fitting graphics: Sets how ceiling diffuser connections are displayed in 2D.
Connection Graphics: Sets how flex duct and hard duct diffuser connections are displayed in 2D.