Add Products by Barcode in Invoice.
Add Products by scanning barcode to avoid mistakes and make work faster in Sale order. When barcode is scanned it will First search for related barcode and after that it will check for matching Internal reference.
You can add multiple qty of same product also by scanning same barcode multiple time.
Just Scan Bar-code in form view of Invoice(Product Bar-code/Reference) and it will add new line. If there is already line with same product it will increase qty by plus one.