Yes, it is possible to make partial payments on multiple invoices in Odoo. Here’s a general way to do it:

1. Go to the Invoicing module.
2. Open the Customer Invoices menu.
3. Open the invoice you want to register a payment for.
4. Click on Register Payment.
5. In the payment form, you can adjust the Payment Amount to the partial amount you want to pay.
6. Click on Validate to register the payment.
   

You would repeat these steps for each invoice you want to make a partial payment on.