Sales Order # on Delivery Note

I would like to print Sales Order number on the Delivery Note. It will printed only when the delivery is related to any sales order.

How to do that?


Follow the solution in this post.

However, I did not include anything in the Depends On field even though the original poster suggests var1 = frm.doc.{against_sales_order} and another person suggests var1 = frm.doc.{fieldname}.

After creating the Custom Script in the solution, just go to Print Format Builder and add So No wherever you wish.