Thanks for joining us here today, @CayleCampbell.

As mentioned by my colleague @AlcaeusF, the ability to determine who viewed the invoice is still unavailable. You can only see the status of the invoice after you send it. You can refer to @ZackE's answer for the different invoice statuses that you need to be aware of.

I see how beneficial it is to be able to determine who viewed the invoice. Our engineers are very innovative with regard to the program update, and this preference might be available in the future. 

In the meantime, I suggest visiting our QuickBooks Blog to stay updated with all the changes that are being made.

Additionally, feel free to browse this link here in case you need help with other tasks in QBO. It has our general topics with articles that'll guide you along the way.

Drop a post anytime if you still have questions or concerns with invoices or about the program feature. I'm always here for you. Take care and have a great day ahead.