If you would like to make a partial payment to an invoice, you can do so in the Payments In-Progress tab, detailed view. Once you've made changes to the Current Payment field and save, the remaining balance of the invoice will return to the Payments Create tab.
To Make a Partial Payment
1. In the detailed view of the Payment In-Progress tab, click into the Current Payment Field in the line items table.
2. Change the amount you would like to pay.
3. Save your Payment. The remaining balance of the invoice will appear in the Payments Create tab.