Checking this option will allow the customer to manually move back and forth through the slideshow if they wish. Unchecking it will remove that navigation. In either case, the slideshow will still automatically progress according to your other settings.

This will pause the slideshow when the customer hovers over the image, and continue once they move their mouse off. A pointer hovering over a slide usually indicates interest in that slide, and the customer wants or needs more time to look at it.

Checking this will always start the slideshow on a random slide when first loaded. The slideshow will continue from that point, and loop around to the beginning once it reaches the end.