| Step 1. | Choose Surfacing tab→Surfacing group→Split list→Parting Split  | 
| Step 2. | Select a planar face or reference plane whose normal axis defines the view direction you want. | 
| Step 3. | Select the surfaces which you want to split along the silhouette edges. | 
| Step 4. | Click Finish. | 
Tip:
You cannot create parting edges for planar faces.