Hi Mohamed
I was just trying to edit the invoice view, but I only can find an invoice view in the backend.
I want to add a logo to the invoice that can be displayed while viewing an orders details in the back end. In the top right of the order details, is the invoice button. I found the invoice view in the backend for my template, modified the code how I wanted, saved it, do changes are apparent when I try to view the invoice at all.
Then, I realised you have to select the ADMIN template for it to work LOL. Now it is fine.