Barcode scan from Sales Order to Delivery Note

ERPNext
1

I created a sales order with 5 qty. From Sales Order I create Delivery Note. Now I want to scan barocde serial no to add items in the child table. Showing this popup.
barcode_scan

I cannot understand its purpose. Not find anythong in the doc. Can anyone please describe about this?

2

can you share the steps to navigate to this dialogue?

3

@Rehan_Ansari Sure.

  1. Create a stock entry with finished goods items. which created serial no.'s
  2. Generate barcode’s with the created serial no’s
  3. Create a Sales Order with this item with qty 5.
  4. From Sales Order create Delivery Note.
  5. Now scanning barcode with barcode scanner device to the Scan Barcode field, show this popup.