Best Of

@Pau I don't think a free-standing legend is an option, but I would suggest setting the same color rules on all 3 cards and hiding the legend on all but one of them so it doesn't have to repeat.

I believe it will keep 9/01 open and then also have 9/08 open. I submitted an Ideas Exchange topic about auto-collapsing:

Cards aren't considered "viewed" by the DomoStats unless the detail view is looked at. When looking at a card on a page it doesn't count that as a card view. As @MichelleH mentioned you can utilize the Domo Governance or Domo Stats connectors for pull the last viewed information for pages and join each card on that page together to get the page last viewed and the card last viewed. Selecting the greatest of these will get you when the card was last viewed.

One caveat is that you may want to ignore page or card views done by Major Domos. You could utilize the Activity Log to see when cards or pages are actually being viewed and can filter out specific users.