How do get multiple layers to overlap over the top of another?
If you set same alignment to the images, the slideshow automatically position the images without overlap. If you need to overlap the images just change the align direction of the next image Ex: BL to TL
Make sure the z-index doesn’t work, The z-index is automatically assign to each content, instead of z-index, use the data-startTime to display the image appearance as per you need