Yes! There are two options for this:
Use a payment plan to break the invoice into installments. Your client can click Pay Now next to the installment they would like to pay.
Your client can type a custom amount into the total field next to the Pay Now button at the bottom of the invoice and then click the button to pay that amount.
We recommend adding a payment plan to your invoice if you'd like your client to pay a deposit and/or multiple installments.