How Parallax Slider Works:
Whale Parallax Slider comes with a dashboard slider generator that makes it extremely easy to use for site admins. You can create your slider at the dashboard, save that and then use it as a ready-to-go slider on every page you want. These are steps to use this add-on:
1- After installing the add-on you can see a "Parallax Slider" link in the "Files" box of your dashboard.
2- Click on the link, and you will see a list of sliders has already made, so users can check and use them as starting points.
3- Go to the page you intend to add your slider, select "Parallax Slider" block, select a prebuilt slider and you are done.