pagescroll

Hello, I used your theme on another site and I amended the code to enable smooth scrolling pagescroll outside of using the single page format,
but cannot remember what I changed (https://amberresources.wpengine.com/industrial-services/). I did have a ticket regarding this, but unfortunately it was on your old forum.
I would like to use the same smooth scrolling page scroll on a different site I am making using your amazing template. Please help 🙂
new site: http://amberindust.wpengine.com/oil-purification-reclamation-long-beach-ca/

Thank-you!

Ticket