Here, two options:
1 - You have a bank movement corresponding to several invoices (several supplier invoices having been paid at the same time for example),
2 - You have an invoice which has been paid in several times, and corresponds to several bank movements. You will find below the steps to follow in each case!
1 - Reconcile a bank transaction with several invoices:
✔ Click on the Bank tab 💸 at the top in the blue banner
✔ Click on the title of the transaction, then on Reconcile in the banner that opens on the right of your screen,
✔ A window opens, select all the invoices concerned,
✔ Check that the reconciliation difference is 0€,
✔ Click on Next and then on Finalize the reconciliation
2 - Reconcile an invoice with several transactions:
✔ Click on the Expected tab 📆 at the top in the blue banner,
✔ Then, right click on the two small arrows that meet on the same line as the invoice in question,
✔ A window opens, select all the bank transactions involved,
✔ Click Next then Finalize the reconciliation.
💡 Good to know: You can also do a partial reconciliation, and thus create an invoice whose amount is the amount of the remainder to pay 😊