Line items printing

if i add any new item to the existing sales invoice(where we r having some sale items already) and if want to print, i couldn’t able to print that one item only…
it is printing all the items again. this is causing confusion to the people which is the added item.
is there any way to print only the required sales item in the sale invoice

From a legal and accounting viewpoint, you should not modify a sales invoice after it has been sent to the customer. You should create a new sales invoice. The reason is that, just as you say, it causes confusion.

Or simply notify the customer to discard the previous (incomplete) invoice and act on the latest (Corrected) invoice. However the best approach as Tut says is create a new additional invoice for the missing item. Whichever way does not not scare your customers away.