how to trigger an image in the scrolling panel when scrolling down?

Hi there,

on the 4 slide of my course ( it's in french:  i am trying to , let's say, get the learner's attention to a specific paragragh. I tried with making a hotspot and when the user hovers over it, it jumps to the next slide where you can see the paragraph in more detail.. but he already jumps to the next slide just by hovering anywhere in the scrolling panel. (allthough the hotspot fram eis just a small part in the scrolling panel) 

Any ideas how i can solve this?

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