The slider supports 5 differents modes on how the content will be overlayed.
Overlay
This is also the default mode.
[image-comparator method="overlay" ...][/image-comparator]Fade-In
[image-comparator method="fade-in" ...][/image-comparator]From-Right
[image-comparator method="from-right" ...][/image-comparator]From-Left
[image-comparator method="from-left" ...][/image-comparator]Side-By-Side
[image-comparator method="side-by-side" ...][/image-comparator]Random
This is not really it method. It just selects a random one from the others.
[image-comparator method="random" ...][/image-comparator]