Default slideshow
You can customize the timeout as well.
By default, clicking the next button will stop at the end. When circular is enabled, it will jump from the end to the start and vica versa.
In cover mode, the image sized to cover the entire slide. This means that in most cases some parts of the image will be not visible either on the top/bottom or the left/right side.
In contain mode, the image will be sized to fit into the slide. The slide will "contain" the image at its largest possible size. The entire image will be visible.
