At the top of the Google fonts and Custom fonts sections, any font you have activated or uploaded will be displayed. These are the fonts you wish to use on your store, but will need settings applied before they become effective.
At the end of each of the activated or uploaded font item you will find a little settings icon. Click this icon to open up the font setting modal popup.
From here, you can control what the font applies to, the weight of the font, the font size, the letter spacing, then line height, and finally the font colour.
Simply input your values and settings, and toggle the font on and off for the specific elements you wish to affect. For example, you could toggle on the H1 and a tags, meaning that font will only apply to those two elements on your store front
