How do I make the font larger on the email notification for announcing an estimate?

Hello info@innercircle.

QuickBooks Online doesn't have an option to change the font size or style of your email notification. You can change it through your email provider's settings or the browser you're using. For example, here's you can change the font size in Chrome:

1. Click the thee-vertical dots in the upper-right corner and select Settings.
2. Go to the Appearance section.
3. Change the Font size.

Let us know if you need anything else.