Option 1: Add additional finished products while creating a production line template
By default, there is one main finished product. To add more finished products at each stage, simply click the '+Add More Product' button.
Options 2: Add additional finished products while processing a production order.
During the production order process for a specific production line, click the 'Add More Product' button and enter the necessary details.
Look up: Process a Production Order
Look up: Create a Production Line Template