This can be useful for paid tickets that need to be opened and adjusted such as refunds.
This tutorial is useful for creating a refund button which you can use during an open ticket or settled/re-opened settled ticket.
You could first follow the second tutorial to create the refund button, then follow the first tutorial to apply re-open settled ticket which you can then use the refund button you created for refunds!
This way, you can either refund an item during an open ticket(Or gift it, or void) and you can do the same for a closed or paid ticket.