I have created two DocTypes Challan and Challan Item but where I select Delivery note in challan Item using link with delivery note then delivery note field does not display in challan Item.
Why do you want to do this, just create a new print format for Delivery Note (?)
Challan made by Branch after making delivery note because one challan will have multiple delivery note with Vehicle No., driver details & date. I want that when I select Delivery Note then consignor name, consignee name,net qty of delivery note should display on the screen in Challan Item.