Remaining invoice balances

When viewing Customer or Supplier part paid transactions on an enquiry screen, you can view the total of the Invoice in one column, the amount allocated again it in another column (If it is part paid). But not the remaining balance of the Invoice. This doesn't really make sense. In order to have a view of the balance, you have to go to a workspace or print out a detailed debtors & creditors report. It's way too slow to have to do this, when the transaction screen is just there. The remaining balance column needs to be added. Thanks