When defining a product structure element you will need to provide the codes that you intend to use when generating products with those codes.
Add all of the valid code values separated with commas for this product feature (e.g. E1, E2, E3). Choose short code values that might help a customer remember the value the code is substituting.
To add a blank value when you generate the code simply start the string with a comma or a hyphen. (e.g. ,E1, E2, E3 or -,E1, E2, E3)
