Make Text Smaller Only on Homepage Slider

I believe this is a commercial product? You’re requesting help from people who may not have access to the product.

As per the Forum Welcome, you should request assistance from where you purchased the theme, that’s what you’re paying for after all.

As a tip, if you right-click an area of your theme and select your browsers Inspect Element tool, you can highlight any part of your site and view the relevant CSS that is being applied to it.

You can obtain class names from there and apply simple CSS to your site using a Custom CSS plugin.

Hope this helps.