If you need to search within your completed items for a transaction to un-match or change codes/descriptions, there is a quick and easy way to locate it.
In your Actuals tab click into the Completed screen. You will notice a search icon at the top right of the screen.

Hover over this icon and a search bar will appear. Click into the bar and start typing.

You can search by date, name, payee, code, and amount, to find the item you need.
Simple!