I am having some trouble with the highlight actions. I basically have a data, where X axis is the age of person and the Y is the time required for each person to finish the marathon. Each point (plot) also have date of birth associated with it. I want to create an action such that if I select a specific date of birth using some sort of slider/scroll bar (like the one shown in parameter controls), only the plots with that date of birth would be highlighted. Is there a way to do this?