Report filters are leveraging the report variables.

    When Filter variable is set up to drill-down path, all Views including this Drill-down will be filtered according the definition.

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    Click on Filter values in Variables and Filters panel to change them.

    In such dynamic defintion, the Views including the filtered Drill-down will be refreshed after every modification done to variable in right Variables panel.

    For more information about Setting Filters on views - continue by Using Filters.

    Filter and variable names

    When creating a filter or variable you are able to give it a name or a code. Just click on the settings sign and give a name to your variable or filter.