@suitecore I don't think you can have a button on the row itself, but you could have a button on the record that dynamically generated a new line for you. And it is also possible to get data from a particular item row, to copy. I think would have to use a custom column checkbox (or some other way to identify which line you want to copy)

thanks for the reply . Is it possible to add a custom button in the sublist ? above the item list?