Dell Lightning User Manual page 33

Check Box
Allows to select one or more options from a multi-selection list. Touch
the check box or the accompanying text label to select or clear an
option.
Radio Button
Represents a set of related, but mutually exclusive options. Touch a
radio button or the accompanying text label to select only one option
at a time.
Slider Track
Controls music or video playback using a slider track. Touch or drag
the track or the progress indicator inside the track.
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Getting to Know Your Dell™ Lightning