The “hidden” balance due on your invoice is for your reference only, AGMINZEY1.
It is labeled as “hidden”, but this portion is meant to help you view the balance due and the amount paid. It won’t appear when you print or send the invoice. Because of this, the option to unhide it in your invoice settings is unavailable.
If you meant something else about the “hidden” balance due, feel free to add a reply below. We’ll gladly help clear up any confusion.