Hi there, @valeriegcharles-.
Welcome to the Community. At the moment, the option to change the font size on a report isn't available in QuickBooks Online.
I know how this would be useful to you and your business. Thanks for sharing your ideas. Your feedback will help improve our products and services in the future.
For future reference, read through this article: Customise reports in QuickBooks Online. It helps you learn about how to use filters to personalize to show what you want to see in your report.
Feel free to message again if you need anything else. We're always here to help in any way we can.
