Topic: next item without clicking "add Item" button and Item double scane

Peace,
I want to ask if it is possible,
(1)---: In  sale-->sale quotation or sale invoices etc. when we select item from "item description" or with a barcode reader  from "bar code" box, so we have to click "add item" button then computer goes to next line, Is it possible that computer automatically move to next line, and
(2)---: also if we double scan one item with bar code reader or select twice so FA increase the quantity of item, Right now, FA says with double scan "his item is already on this document. You have been warned."
waiting ...
Thanks in Advance

Re: next item without clicking "add Item" button and Item double scane

You will need customize sales entry screen code to have this application behaviour.
Janusz