Font related parameter can be changed via customize >> typography. It is available in Pro version only. From here different sections typography can be reached which are as follows:

1. Site identity : Allow to change font parameter of site title and tagline.
2. Header setting: Allow to change font parameter of Top address and date, Menu and hot news section.
3. Section and widget title: Allow to change font parameter of section title and widget title.
4. Post title and meta tags: Allow to change font parameter of post and page title, meta tag such as category name, date, author name
5. Default widget content: Allow to change font parameter of default widget’s content such content of Archive, Calender, recent comment etc that placed in sidebar.
6. Footer bar: Allow to change font parameter of any widget title and its content that placed in footer area . This overwrite any other setting done in above section. It is exclusively done for footer area.
7. Description: Allow to change font parameter of short description ( called as excerpt ) that shown in the front page.