Show payments made somewhere on the invoice

Our clients pay an initial 25% deposit and then final payment 2 weeks before their event date. Some clients make 3-4 payments during this period. Right now it shows the total invoice amount at the bottom of the invoice and payments due at the top but it would be very helpful if each payment that is applied showed as a line item somewhere on the invoice so they can see what payments we have recorded. People are getting confused when they see the total at the bottom without it showing other payments.