To be able to use Typekit fonts inside Master Slider plugin you need to integrate Typekit into Master Slider:

1. Install the Typekit plugin https://wordpress.org/plugins/typekit-fonts-for-wordpress
2. Go to Master Slider and add a Text Layer to your slide.
3. Go to the Style tab of the Text Layer properties and click on the SELECT option.
4. On the pop-up window click on Custom Style.
5. Add custom CSS to use your font family, e.g. font-family: “ltc-bodoni-175”;

This method is specific to the Master Slider slideshow and is not part of the Jupiter theme functionality.