How to make a Bank Deposit that includes "Add funds to this deposit" section?

I'm entering deposits from Square (payments from customers) that have the Square processing fees taken out, so the deposit is for the net amount (Customer Payment - Square processing fee = Net Amount).

A previous bookkeeper was making Bank Deposits for these Square payments that included the section called "Add funds to this deposit".  Under "Select the payments included in this deposit", there are the matched invoices, paid in full for their total amount due.  And below, there's a section titled "Add funds to this deposit" where the Square Fees (Expense Account) is entered with a negative amount for the processing fee.  This results in the overall Bank Deposit to be the correct dollar amount.  I can see that it's possible from their previous entries.

However, when I try to enter a Bank Deposit, there is no section for "Add funds to this deposit", so I can't adjust the amount.  The only way to accomplish everything is to directly Make a Payment to the Sales Invoice (in full) and enter a separate expense transaction for the Square Fees.  This is fine, but results in two entries on the bank account register, whereas the "Adjusted Bank Deposit" as I describe above is able to do everything in one entry on the bank account register.

How can I do a Bank Deposit that has the "Add funds to this deposit" section?