Bellows Control Panel > Main Configuration > Font
Setting the font
The Font Family setting allows you to set the font-family for the menu.
You should set a full font stack here, e.g. Inter, Arial, sans-serif
A note on font assets
It is important to keep in mind that this does not actually load any font assets.
Generally, fonts are controlled by the theme (or a font-specific plugin), and you’ll want the menu font to match the site font.
You should only add font families in this setting that you expect your users to have on their devices (standard font stacks) or @font-face fonts that you have already loaded on your site through other means.
In other words, this just sets a CSS property, it doesn’t actually deliver the font itself.