Hello there, @busyb158.
I knew a few steps to be able to change your screen size to normal. I'm here to help share them with you.
If you're referring to the QuickBooks home screen, you can follow these steps:
However, if you're referring to the monitor screen, you can consult with an IT Professional for further assistance.
In case you have any other QuickBooks concerns in the future, you can check our self-help articles: Help articles for QBO.
Let me know if you have any other questions about adjusting your screen size. I'm just a post away to help you!