Only item code without name how to this

Ex:
Item code:-IT001-demo-item

instead of this i want to show the demo-item only is this possible …need help for the same …

change the id name by expression or naming_series

any example for child table item code

Ex:
Item code:-IT001-demo-item

instead of this i want to show the demo-item in sales order only is this possible …need help for the same complete example