STATUS OF CONVERTED INVOICE FROM SALES ORDERS

STATUS OF CONVERTED INVOICE FROM SALES ORDERS

Hello, 

I have an issue. I need to be able to choose the status of the invoice after has been converted from sales orders. 

How can this be set up?

When I convert a sales orders into invoice, the status of the sales orders changes to "paid", but I do not want to change the status of the sales orders automatically, but manually, as sometimes the invoice is issued but has not been paid.

Thank you.