Typography (or fonts) helps set the tone of your stories so choose from Exposure Classic, Simple Serif or Simple Sans-Serif and that theme will apply to all your stories and across your Exposure site.
To change your Typography theme head to your Site Preferences and explore the selection under Design Options.
Example of Exposure Classic, Simply Serif and Simple sans-serif
Typography Themes are managed from your Site Preferences and is a Pro and above Subscriber feature.