Here you can add a custom CSS class or ID to each slide and also add alt attribute to slide background image and more, as described below.

OptionDescription
Class nameAdds a CSS class to the slide.
CSS IDAdds a CSS ID to slide.
Background colorAdds color to slide background.
Alt textAdds an alt text attribute to the image in slide background.
Color overlayAdds color overlay to the slide.
Pattern overlayAdds pattern overlay to the slide.

The figure below shows these options on Master Slider panel.