You can easily change the fonts displayed in your store's website, under Theme Settings.
To change the Fonts on your PowerStore:
1. Login to your Workspace
2. Click on Themes from the left menu.
3. You will be taken to Theme Settings
4. Scroll down the page to the "Fonts" section. Use the pulldown menus to change the fonts, and enter your desired font sizes in the text boxes.
5. Scroll back to the top of the page and click "Save And Apply" to save the changes.
To view the new fonts on your website/store:
1. Click "View Your Store" in the upper right corner of your Workspace.
2. You will be taken to your website home page. The text of your should now be in the new font.
If the new fonts are not showing, click "Refresh" to refresh the page.
If you want to choose a different font from the choices listed in the pulldowns, see this article on Installing Custom Fonts.