I’m on the self-hosted version of ReDash. I’ve created a dashboard with a query parameter such as “geographical region” where a user selects which region they want to view. I wish to have an additional select of “Total” (as there is no multi-parameter selection?). What’s the best way to do this? Are there any examples? I imagine that I will have to union on a “total” query so then be able to select this within a drop down query parameter.