Sometimes you need a property that can contain a list of items, for example, colors, sizes or locations. The list type can contain a list of items of a single type, such as text strings, numbers, or values of a custom type.
Click the Widget API icon.
Click Add New Property or hover over Properties and click the icon.
Give your property a significant name and a display name.
Select List in the Property type menu.
Select the type of items on the list (or create a new custom type for them).
Describe your list.
Click Add items... to add items to your list.
Click Create.
Open the site in the Wix Editor or Wix Studio.
Select the widget (learn more about installing a widget).
Click Settings in the widget's action bar to see the list.
Edit List in Blocks Versus in a Site: