To be able to use Adobe (Typekit) fonts inside Master Slider plugin you need to integrate Typekit into Master Slider:
1Install the Typekit plugin https://wordpress.org/plugins/typekit-fonts-for-wordpress
2In order to use Adobe fonts in your slider, you need to create a project with your fonts in Adobe first.
You can learn more about it in this article.
3Copy the ID of project you created in Adobe Fonts.
4Go to Settings > Typekit Fonts and add your Project ID into Typekit Kit ID field.
Save the settings.
5Go to Master Slider and add a Text Layer to your slide.
6Go to the Style tab of the Text Layer properties and click on the SELECT option.
7On the pop-up window click on Custom Style.
Add custom CSS to use your font family, e.g.
font-family: "alexa-std";
8Click on Apply Style button and Save the Changes for the slider.
Note: This method is specific to the Master Slider slideshow and is not part of the Jupiter theme functionality.