When I was on support yesterday, the QBO advisor had me shrink the screen so everything could be seen. How do I enlarge it back. It was one button but I don't remember

Thank you for posting here in the Community, kmollett. I'm happy to assist you in setting your browser's screen back to its normal size.

We can enlarge your screen by clicking on the maximize icon ( 🗖 ) located at the upper right corner of your browser's interface.

Additionally, if you wish to enlarge its font size, you can also follow these steps:

1. Click the ellipsis icon ( ︙ ) on the upper-left corner of your screen.
2. Zoom in the text by pressing the Plus sign (+) beside the Zoom option.
3. Maximize the interface accordingly. 

Furthermore, I added an article that'll help you in case you wish to personalize and add specific info to your sales forms:  Customize invoices, estimates, and sales receipts in QuickBooks Online.

Feel free to reach out in the Community if you need more help on setting up your QBO preferences. Have a great day!