Order > Order Invoice
From Shopnix Help
What is order invoice ?
Order invoice is the receipt of the order placed by the customer. You can take a printout or email to the customer regarding their order.
Where to get this feature ?
Go to Admin > Orders
Then click on the invoice icon (red square in above image) under the invoice column. Then a pop will emerge with all the details i.e. order ID, shipping address, number of orders and prices, etc like below image.
You can take out a printout of the invoice and can paste on the order or even you can mail it to respective customer like below.
If you have more queries or would like assistance with this please contact us on firstname.lastname@example.org.