In a dashboard filter, you can select a single value from a dropdown menu.
This mode of filtering enables you to select a single value from a dropdown menu. It uses a dropdown menu for selection.
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:
Manipulate the filter widget in the following ways:
In the state filter, click the (downward arrow) icon to open the menu of available choices.
The application control expands.
Notice that you can only select a single item from the menu.