About Dashboard Filters
Dashboard filters provide filter controls for consumers on an individual canvas.
As an author, you usually add and set filters in the filter bar to broadly limit the data in your workbook, see Use the Workbook Filter Bar. You can then add and configure dashboard filters on each canvas to allow consumers to select their own filter values to change the data in the visualizations.
Dashboard filters are contained in the Dashboard Filters visualization. After you add the Dashboard Filters visualization to the canvas, you can then drag and drop columns to this visualization to create dashboard filters. Oracle Analytics assigns default properties based on the column you chose to create the filter but you can modify the filter's properties to better suit the data and improve the user experience.