I would like to be able to 'virtually' overdraft a subaccount. I use the subaccounts for budgeting. But sometimes I have a short time cashflow mismatch on a specific (can be any) subaccount. Currently, I have to temporarily transfer money from one subaccount to another. Instead, I would rather overdraft the first subaccount, knowing that the total amount over all subaccounts is positive. This saves me manually transferring money back and forth.