Rellax plugin is used to create animations for some elements when the page is scrolled. It is located in app/vendors/rellax-master folder.

The images parallax effect from overview section were built with this plugin.

If you want to implement this you will need to add a class named “rellax” preceded by a attribute “data-rellax-speed” and “data-rellax-percentage” like in the example bellow.

<img class="rellax" data-rellax-speed="-1" data-rellax-percentage="0.5" src="image/your_img" alt="...">

The animation can be enabled with the following javaScript code:

<script>
  // Center all the things!
  var rellax = new Rellax('.rellax', {
    center: true
  });
</script>

Also you can disable it with the rellax.destroy(); function.

You can find more about this on https://github.com/dixonandmoe/rellax