Hello @lisacole1,
Thanks for writing to us.
You can use the “Viewport Width” unit in your font-size to get responsive and fluid typography. Please have a look at these articles.
https://www.w3schools.com/howto/howto_css_responsive_text.asp
You can try this custom CSS code to get fluid font-size. Add this custom CSS code in X-->Theme Option ---> CSS
For Tiny Cat Gallery section
.e1061-4.x-text h4 {
font-size: 5vw;
}
For Think outside the box section
.e1061-7.x-text h5 {
font-size: 4vw;
}
Please feel free to change the font-size value as per your design.
The purpose of providing the custom CSS to show you how to add CSS code to your site. Writing custom CSS is outside the scope of our theme support. If you need more customization, you need to learn CSS and learn how to use the browser’s element inspector.
Hope it helps you.
Thanks