Let me provide some details on how the custom fields in your Purchase Orders affects the bill.
If you're referring the Color and Material field as a line item, this means you can copy it to a bill by clicking on the Select PO button.
But if you’re referring to color and material as custom fields, there’s currently no option to copy it to the bill. This is because the color and material fields are customized for your purchase order only.
Please let me know if you have other questions about purchase orders or bills. I'll be glad to help you.