This blog post gives a an overview of the Tableau Server Certified Associate exam, how I prepared, and some links to resources.
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.
Creating a Selection Panel with Set Actions
How to create a selection panel - of 25 rows by 2 columns - to make selections which are used to highlight elements in a bump chart.