Once the product is in production, you can also create partial invoices. If you have selected the order to be invoiced under Accounting/Invoicing, you can create an "Partial invoice" using the dropdown menu.
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You can add items (products) from the order individually or bill partial quantities. To do this, simply drag the desired item onto the respective field.
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Then invoice the invoice as usual. The invoice with the remaining items or editions remains open under Accounting/Invoicing until the order has been completely invoiced or marked as completely invoiced.