Moving from AccountEdge to MYOB Business Lite

I'm a sole trader with just two clients, and I use cash-based accounting. I send invoices for my work.

In AccountEdge I create an order, which looks like an invoice, and send it to a client. When payment arrives I convert the order to an invoice, and change the date to the date of the payment.

I've looked around Business Lite but don't see anything like a Sales Order. I see that I can create a quote, which I can later turn into an invoice, and think I should be able to use this the same way I've been using Orders in AccountEdge, except that I need the text "GST Invoice" to appear on the quote. Can I add this somewhere?

And am I stuck with it saying "Quote" at the top of the form or can I modify that?

Thanks in advance.