To change order status follow the appropriate explanation below:
Navigate to the Orders / Order in question.
How to Open and Fulfill the order
Check the status of the order, if you wish to Fulfill the order click on "Mark as Reopened" located in the top bar.

How to place the order on Hold
Check the status of the order, if you wish to place the order in staus Hold click the "Mark as Hold" located in the top bar. 
How to Close the order
Check the status of the order, if you wish to Close the order click the "Mark as Closed" located in the top bar. 
For the order status explanation please see: Order Statuses
Comments
1 comment
need to know how to reopen an order after it is accidentally closed
Please sign in to leave a comment.