Edit metafields app in shopify theme. I explain here: https://docs.google.com/presentation/d/1WP4q08_xr88pQ-F8Ald0i9ULEPf22bQkXdwMpHjxqrE/edit?usp=sharing (Budget: $10 – $30 USD, Jobs: Shopify, Shopify Templates)
Edit metafields app in shopify theme by webmasterJC