Power BI Slicer For Multiple Columns

Recently I had the need of creating a slicer in Power BI that would filter against different columns in a system storing the same type of data: case types for Student Legal Services. 

For purposes of remembering how this functionality was accomplished, I’m documenting it here:

https://www.sqlbi.com/articles/creating-a-slicer-that-filters-multiple-columns-in-power-bi/#