See here: https://wpportfolio.net/docs/wp-portfolio-shortcode-and-attributes/

See the guide at https://wpportfolio.net/docs/getting-started-with-wp-portfolio/ When you select a portfolio type, you are selecting a type for the individual portfolio item you are adding. Basic overview Website Not just for websites – this is the type for an image that links to a URL (e.g. shop items on another site). Each entry has a Thumbnail […]