Go to 'Settings' > 'Orders'.
In this article you will learn about:
Order settings you need to know and verify
General order settings - Here you can set the order numbering, select whether the customer will be redirected to the cart after adding a product, select if comments should be added to order and activate customer accounts (this applies only to selected subscription plans).
'Thank You' page
This is the place for additional scripts on the "Thank you for your order" page.
It's an ideal place for conversion codes.
Orders settings you may want to know
Order status - Thanks to the order status tags, you can always keep track of your orders and keep customers informed. Learn more about order status.