Deprecated function: Optional parameter $data declared before required parameter $name is implicitly treated as a required parameter in include_once() (line 1442 of includes/bootstrap.inc).
Deprecated function: Optional parameter $item declared before required parameter $complete_form is implicitly treated as a required parameter in include_once() (line 1442 of includes/bootstrap.inc).
You can change the Status of an Invoice from Draft to Sent, by clicking on the Mark as Sent option under the Invoice Actions dropdown.