Smooth Scrolling to Anchor Targets

Hi there,

How do I make the anchor links on my one pager scroll smoothly to the anchor targets? Currently they just jump to the target when selected.
Is this a feature within BeTheme?

You can see the side menu links- Acupuncture, Cupping etc on the top left of the page.

Here is the website link: http://jaiwellness.com/treatments/chinese-medicine/

Thanks! :)