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How to template interactions on a newly created class

I’ve purchased and am currently using the Callisto template. Throughout the template, there’s a consistent interaction applied to all the classes (such as Grid 3 Column) when the page loads/scrolls. I have just created a new class for a grid and want to apply the same interaction to it but I can’t seem to find the interactions used in the Interactions tab.

Any help would be very much appreciated. Thank you!