Query Diffuser
To modify a diffuser that is inserted on the drawing, go to
Ribbon: 
Query Diffuser
Pulldown Menu:
Select a diffuser on the drawing. The information in the database regarding the selected diffuser will be displayed in the Query Diffuser dialog box.
Query Diffuser Dialog Box​
Changes can be made to the diffuser in the same way as when it was inserted. See the Insert Diffuser section for more information.