Mold Design and Casting > Working with Parting Surfaces > Modifying Parting Surfaces > About Trimming a Parting Surface
  
About Trimming a Parting Surface
Use the Trim tool to trim a parting surface. You can select a datum plane or an existing surface feature to use as a reference for trimming another surface.
To access this tool, click Mold > Parting Surface > Trim or click Cast > Trim.
For more information on using the Trim tool, search the Help Center.