One of the alternate methods to change the automatically placement behavior, say for elbows is possible with the Autofitting Preferences. The Autofitting Preferences dialog is used to define settings such as radius, throat lengths and elbow segments, transition angles, and use of a particular take-offs, tees and crosses for branch lines etc. The standard placement settings are stored in an XML (Autofittingoptions.xml) file and applied as auto fittings preferences in placement.

When routing a duct, by changing direction, the autofitting component –e.g. a tee or a cross, gets placed to the branching in the direction of selected justification in placement.