Capture - assign to banking transaction

Hi all - my workflow for minor expenses (coffee, meals etc) is to pay for the item, wait for come to  through on the bank feed, and then assign to an account.  I use Capture on my phone to take a copy of the receipt. 

I cannot see how I can assign it to the transaction.  MYOB wants me to create a bill or spend money transaction which is a pain and overkill for a minor expense like a coffee.

Does anyone now how to assign a receipt to a banking transaction?

thanks.