What field are you trying to add? Is it available in the drop down when you press the pencil icon?
Yes i want to add field which is Bom in every line item
I tried to change the Dialog in erpnext.public.js.utils.js but its not working
That would be difficult I would imagine, tbh I don’t know what ERPNext does when you submit an order item with BOM.
Might be easier to submit, cancel and amed?