In a dashboard filter, you can ensure that parameters show a distinct 'key':'value' pair.
This option ensures that each selection is processed by the filter as a distinct 'key':'value' pair. By default, the selections are passed as a 'key':'list of values'.
This option enables a single filter to be potentially used for multiple purposes.
In dashboard Edit mode, hover over a filter until its controls appear on the top right.
Click the icon (gear).
The Settings modal window appears.
In the Settings modal window, under Display Settings tab, check the following option:
Notice when the Emit distinct parameters for each item selected option is selected, parameters show a distinct 'key':'value' pair.