Hello,
Thank you very much for choosing our theme and for contacting us.
You can configure the typography in the Theme settings > Typography
Besides the Advanced typography option provides wider options, which allows to choose the item from a drop-down or insert your custom CSS class. Please navigate to the Theme Settings > Typography > Advanced Typography.
Here is the documentation providing more detailed instructions: https://xtemos.com/docs/woodmart/advanced-typography-settings/
If you have any questions please feel free to contact us.
Best Regards