My Customer has not gotten back to me yet. How can I tell if they have seen the invoice yet or not?
If you go to a Customer → AR → Transactions you will see a list of all your transactions with that Customer. There will be a magnifying glass icon next to the transaction name. If you click on that icon there will be a list of the date and time of each time the invoice was viewed on the Partner Portal. This will also give you the name of the contact who has viewed the transaction as well. If there is no Magnifying glass icon next to the transaction name then that means it has not been viewed yet.