How To Get Started: Easy Smooth Scroll Links Plugin

Hi there, I’m stuck from the very beginning, Searched youtube for videos that show how to use this plugin but nothing yet. Because after installing and activating, i can’t find how to configure/tell the plugin, which are the anchors it is supposed to scroll to… Does it find them automatically on its own, or do i have to tell it somewhere in its settings of which i don’t see anywhere in the settings where i can do that…?

It’s a single page site
Using Themify Ultra

Thanks a lot in advance.