Using check box filters
In a check box filter, each unique value in the column is represented by a check box. It is used to filter to combinations of values in the data column.

Only rows containing values with selected check boxes remain in the visualization.
If there are empty values in the data column, there is also an (Empty) check box available.
Selecting all check boxes means no filtering is made, and clearing all check boxes means everything is filtered out.
Values that have been filtered out by other filters are indicated with gray text.
Procedure
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