Eunice here from Shopify, thanks for posting, and welcome to the Community!
Because the Prestige theme is a third-party theme you might find the answer to your question by checking the theme’s documentation for a tutorial, or, by contacting the theme developer directly. Both the documentation and contact details are located within the theme listing on the Shopify Theme Store.
It’s good to note that Shopify Support only provides support for free themes listed on the Shopify Theme Store. This handy resource provides more information on where to find support for your theme.