External Reference in Bank Postings

The data entry screen for Journals includes a column where the external reference can be entered.

However, for bank payments, this column is not there.

Since, I annotate my bank statements with a reference number and I usually enter posting directly from the bank statement, it would be useful to add this reference at the time of posting.  (It is much more time consuming if I have to keep coming out of the Bank screen to edit the posting.)

Is there any way to edit the layout of this screen?

Steve