Is there a way to get out of split screen view when reviewing invoices or estimates to enlarge the full-size QuickBooks online?

Yes, there's a way to get out of split screen view, jwmasterplumber. I'll gladly guide you on how to do this below.

The QuickBooks Online (QBO) screen won't split when viewing sales forms or transactions. However, if you're using the built-in shortcut key Windows + Left/Right arrow to maximize your app or desktop window to the left/right side of the screen, you can press the Windows + Up arrow keys to enlarge or display QuickBooks to its full size.

You can learn more about using shortcut keys to speed up navigation within QBO by checking out this article: Keyboard shortcuts reference guide for QuickBooks Online.

Also, you can pull up the Transaction Detail by Account report to show a list of invoices due on a specific date range. Please see this article for the complete guide: Customize report to see invoices due in QuickBooks Online.

If you have any other questions regarding the QBO display screen or concerns about managing income and sales transactions, feel free to post them below, and I'll be happy to help you.