The Create Planar Patch command creates, edits, or deletes a planar patch. 
Create a planar patch
-  In the Core/Cavity tab, click Create Planar Patch.
-  In the graphics window, select an edge on the plastic part.Note: In this feature, you can select only the edges on a planar face.  
- In the Create Planar Patch dialog box, click Direction to reverse the travel direction.
- In Travel Path, click Add Edge. In the graphics window, the next edge highlights in red. 
- Continue to click Add Edge to select edges in the loop, or click Back Traverse to retract edges in the loop. Note: Add Edge is disabled when you select all edges in the loop. 
- Click Apply, or OK.
Edit a planar patch
- In the Mold Design browser under Patching Surfaces, right-click a Planar Patch node, and then click Edit Feature.
- In the Create Planar Patch dialog box, modify the settings.
- Click OK.
Delete a planar patch
- In the Mold Design browser under Patching Surfaces, right-click a Planar Patch node, and then click Delete.