DavidChurchman Coach

Yes, this would be good. Then you can use the viz as an icon for an overview page

You should be ale to eliminate the null option with a card level filter. For single-selection, I think you want the radio-button, not the slicer. For default filter, I am not certain, but I think if you add what you want the default to be to the default filter view, and then users should be able to use the radio to switch…

If you are wanting to add and subtract columns, it sounds like you do want to join the datasets based on the row numbers of each dataset. This seems more appropriate for ETL than within the card building

I came here with the same question, and there is an option to disable these icons now, in the filter option menu of the wrench menu of the dashboard.