Single-Select attribute types
You add the Single-Select attribute type to a form when users can choose one value from a relatively short list of options that do not change often. You define the options that users can choose when you create the attribute in the Allowed values for the field field. You also define whether the attribute displays as a drop-down list or as a radio button group in the Field Type field. Users can select only one choice from the list.
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Remove: Deletes the selected value.
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Up: Moves the selected value up in the list.
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Down: Moves the selected value down in the list.