Welcome to the Community, @accounts-worldfo.
I'll help you change the font in your estimates and make it bold in QuickBooks Online.
You can create a customized template where you can set the fonts to be bold in your estimates. Follow the steps below.
Then, try to create an estimate and see if it shows bold font.
Here is an article you can read about customizing sales forms in QuickBooks Online: Customise invoices, estimates, and sales receipts in QuickBooks Online.
For future reference, you can read this article to help you in converting estimates to invoices: Create and send estimates in QuickBooks Online.
Feel free to click the Reply button below if you have questions about customizing form in QuickBooks Online. I'm always here to help. Have a great day.
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