If transport forms have been created incorrectly or need to be deleted for any reason they can be removed using the button. This can be a permanent deletion including all history of just the deletion of the form from its current location.
If a transport form is present in a control point in TE a message will be displayed asking if the form is to be permanently deleted or just removed from the control point:
Permanently deleting the transport form will completely remove it and all history from TE.
Just deleting from the control point will delete the transport form from its current location but still retain the form and history is TE.