This post highlights some of the techniques used in this travel planner dashboard that allows you to draw out two routes on a map, select the methods of transport and then compare them by distance and carbon emissions.
Hierarchical Selections in Tableau
This post explores an approach for implementing hierarchical selections in Tableau which can be used for filtering and highlighting.
Creating a Selection Panel with Parameter Actions
This post walks through how to create a selection panel using parameter actions, storing all selected items in the same parameter and giving feedback when the max number of items have been selected.
Drawing on Dashboards
Using a parameter as data source, this blog shows how you can draw sequential points over a grid or on a map with spatial points.
Parameter Actions
The second beta of 2019.2 includes an upgrade to Parameter Actions, which now allow you to select multiple values and pass an aggregation of those values to a parameter. This blog explains this new feature and walks through an example.