Invoice.tpl Modification


I am using ver 4.7.4

I am facing 2 problems

1.I am trying to make minor modifications to invoice.tpl mostly css



cc and ctpl after mods but NO changes affect, I also tried to empty the files to produce an error BUT nothing !

2.I can see the barcode at admin->view->order and at cusstomer->my orders BUT not inside an invoice

I cannot understand what is causing these problems

Please check my answer in your other threads