To Use RefPart Cutout
1. Activate the reference part.
2. On the Mold or Cast tab, click 
Cavity. A CONFIRMATION menu appears, and you are alerted that trimming the workpiece or the die block will affect future molding.
Cavity. A CONFIRMATION menu appears, and you are alerted that trimming the workpiece or the die block will affect future molding.3. Click Confirm or Cancel. If you click Confirm, a message appears that the operation has been successful.