Specifying Rise Drop Symbols for a Duct System

1. In the Project Browser, expand Views (all) Floor Plans and double-click a view for the duct system.

2. In the Project Browser, expand FamiliesDuct SystemsDuct System.
3. Right-click a duct system, and click Type Properties.
4. In the Type Properties dialog, under Type Parameters, under Rise / Drop, click the Value column, then click to open the Select Symbol dialog where you can select a rise drop symbol.
5. Click OK.