Prev Next Buttons for previously viewed slides

Hi everyone,

I removed the default Prev and Next buttons and created my own. I also added a trigger to only make them visible once the timeline ends. I also created several variables 20+ to monitor each slide. I did this for the users who click on Prev to visit a previous slide so they will not have to wait for the timeline to end again. The variables check to see if it's a previously viewed slide and if so, then show the Prev and Next buttons, if not then wait until the timeline to end before showing the Prev and Next buttons. Is there a more efficient way to do this.

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