Trigger activated by which slide was visited


I would like to know if there is a way that a trigger would be activated depending on what slide the user is coming from or has visited before? For example, on a slide I have 4 buttons and I would like only 3 to show if they have already visited a certain slide. I could put the 3 buttons on a layer and put a trigger to show that layer if / when xxx - what would be that xxx?

I am not sure if this is clear, but I hope you can help!...


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