Changing fill of Rollover slidelet area

Hi, In my e-learning project with Captivate 2019 I am using Rollover Captions and Rollover Slidelet. For the Rollover Caption I adjusted the color of the fill. When the user hovers over the rollover area, this area changes to a light red and a text appears. I tried to adjust the Rollover Slidelet as well, but so far, I could not find how to do this. Is it with Rollover Slidelets only possible to show a stroke for the rollover area […]