Print Without Amount as default in Delivery Note

How can we set the “Print Without Amount” in a Delivery Note as checked by default?

Under Customize Form for Delivery Note, I see for row #94 in the default form values Print Without Amount for Label, Check for Type, print_without_amount for Name. I expanded the menu to edit row #94 and selected Mandatory hoping this would work but it did not.

Any suggestions?

Set default value as 1