By default, the platform does not have this option. You can use the following CSS code.

As a workaround, you may use the following CSS code. Please see the steps below:

1. Go to BuddyBoss > Theme Options

2. Under Custom Codes, enable CSS

3. Append the following:

#primary-navbar a {
font-size: 18px;
}

4. Save changes 

Note: Any modifications are considered as custom work already. Know more about our Support policy here: https://www.buddyboss.com/support-policy/

You can share your idea to our roadmap page: https://www.buddyboss.com/roadmap > click on the +Submit idea button for a new feature suggestion for our development team to look at.