After all the Component Items have been added to the Inventory Production screen, press [F10] or [Enter] and use the Optional Items button to open the Optional Items screen.
On the Optional Items screen, select the Optional Items by entering them by Stock Number, Product Code, Description, Class, or Manufacturer (or press [Ins] to select them from the Inventory Lookup List, pressing [F9] to switch between entry modes if necessary).
After entering all the Optional Items, press [F10] or [Enter], then select the Save Template button to save the Production Item Template.
See:
Production Module Contents