The fonts of your online shop are predefined depending on the theme that you selected. For more information, read the article Using themes / design templates. You are also able to change the fonts of your shop.
1. Open the editor by selecting Editor in the main menu within the administration area of your shop.
2. Select the brush icon at the bottom of your shop.
3. Select the A symbol.
4. Select Change font to either change the font for headings or subheadings and texts.