Maintaining object states once leaving slide/scene then returning

I have a course with multiple scenes.  Scene 1 has a navigation slide with buttons jumping to the other scenes.  I have added a trigger to change the state of the button to visited once clicked, but, at the end of the scene when I return to the navigation slide, the state resets to normal.  

How do I keep the visited state when returning to the slide?

Thanks

JG

 

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