How do you make a metric set with multiple dimensions in the Slicer render "OR" results instead of "AND" results?
Make Multiple Dimensions in the Slicers render "OR" instead of "AND" Results
The slicer of a metric set is designed to render only AND results. You can render OR results of several filter conditions using the Or Operator in a Filter Transform on the Data Cube.
You can also setup your own manual query in the data cube including OR conditions and use placeholders to link those up to filters on the dashboard. You can even take this one step further and add bridge parameters to sync those filters with other hierarchies on your dashboard