In a dashboard filter, you have an option to select a single value from the menu.
This mode of dashboard controls uses radio button choices to let the user select a
single value.
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In the dashboard's Edit mode, hover over a filter until
its controls appear on the top right.
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Click the Gear icon.
The Settings modal window appears.
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In the Settings modal window, under Display
Settings tab, check these options:
- Allow only one item to be selected at a time
- [This is on by default] Remember previous selections
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Click Apply.
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Notice that you can only select a single item from the menu.