Edit Product Types
This page is divided into two columns: the column on the right contains all the available properties (created by going to Catalog -> Product Properties). The column on the left contains all the properties assigned to the product type.
Product Type Name:
This is the name of the custom product type.
To add, select an available property on the right, and press the "Add" button. The property will show up on the left.
To remove, select the property on the left, and press the "Remove" button. The property will be removed from the list, but will still show up in the list of available properties on the right.