How to make font darker

Hi meldmsl,

It's a pleasure to see you in Community.  Welcome!  I can see how beneficial it would be to edit the font in your QuickBooks Online account.  Although you can change the font on your forms, there currently isn't an option for editing it in your books.  I suggest sending your feedback to our Product Developers by selecting the Gear icon and choose Feedback.  

Feel free to get back to us if you have any other questions.  We'd be happy to help!