Use the Style Manager to apply system-level display overrides that control the display representation for objects in a particular system (such as Duct - Low-Pressure Supply).
Note: Although MvParts can be assigned a system, their display properties are not controlled by systems.
- Click
. 
- Expand the desired objects folder, such as HVAC Objects.
- Expand the system definitions for that object.
- Select a system, and then click the Display Properties tab in the right pane.
- Under Style Override, select the box for the display representation where you want to apply an override.
- In the Display Properties dialog box, modify the display properties of the display components as needed.