If there are some exported invoices from the same supplier and with the same document type as the one you are working on, you can use the Accounting History function (NB - Contact support@compello.com to get this activated). Click on the folder icon abov the invoices lines. If you have enough older invoices for that supplier, you will see them here. Choose the one that best matches what you want to do with the new invoice and then choose if you want to import the rows with or without approvers. The row amounts on you new invoice will reflect the proportions of the invoices whose lines you use.