How to get Portfolio Categories Links to Display & Filter (as in Demo)

I would like to have a portfolio landing page that behaves like the one you have in the Multicorp demo, however, rather than displaying a page that has the word ‘categories’ with filterable links and dynamic content that changes the images on the page accordingly, my default portfolio page is instead showing images from all my categories (with no filter option).

How do I get this to display on my main portfolio page?

Thank you in advance!
Cathy