The initial size of the workpiece is determined by the bounding box size of the reference model(s). The bounding box is, by default, a rectangular representation of the reference models showing its size envelope in x, y, and z directions. In the case of multiple reference models, a single bounding box, including all reference models, is used for workpiece creation. The location of the workpiece is dependent on the reference model's x, y, and z coordinates. Only the z coordinate has a unique positive and negative value. A rectangular workpiece uses the center of its bounding box as its center. A cylindrical workpiece uses the selected coordinate system as its center.

The orientation of the workpiece is determined by the mold model or mold assembly coordinate system (mold origin). You can move the workpiece coordinate system in relation with the mold assembly coordinate system using the thumbwheels in the Translate Workpiece area of the Automatic Workpiece dialog box.