Thumbnail
A Thumbnail represents an image and is displayed in the navigation bar when the ImageSliderNavigationBarSettings.Mode (via the ImageSliderSettings.SettingsNavigationBar.Mode) property is set to Thumbnails.
If an image thumbnail is not specified explicitly, it is automatically created by the ImageSlider extension.
Thumbnail style settings can be customized using the ImageSliderStyles.Thumbnail property (via the ImageSliderSettings.Styles.Thumbnail).