adjust an open order

I would like to be able to adjust/edit from the "All Open Orders" page, what parents have billed to their account.

There are times when a parent thinks they need a certain size tights, shoes, leotard, etc. will bill to their account, but after giving the items to the parent, realize they need a different size.

The only option on that screen is to "mark as processed". (along with email or print). I need to be able to delete or make changes.

Right now i have to mark it as processed and then go back to reset my inventory.