Hello there, John. Currently, QuickBooks Online (QBO) does not support the ability to bold text in email messaging for invoices.
While we can customise the font style, size, and color in predefined areas, such as headers, labels, and totals, on the Custom form styles page, bolding text for invoice email messages is not possible at this time.
We understand that this feature would enhance visibility for your recipients. Thus, we encourage sharing your feedback to help us in refining invoice processes.
Here's how:
- Go to the Gear icon and select Feedback.
- Enter a brief description of your product suggestion.
- Click Next to submit it.

Please leave a reply below if you have more questions or QuickBooks concerns. We'd be glad to provide further help.