Use the form to create a list box for custom fields. This requires the field type 'Option' to be selected on the Custom fields form. All options selected on the Options by custom field form are displayed in a list box from which the user can choose a value.
The available values are organized in option groups. The option group 'Colors' might contain the values 'Black', 'White', 'Gray', 'Red', 'Yellow', 'Blue' and 'Green', for instance. In addition to a description in the default language, the values can also have descriptions in other languages.
To create a list box:
Example
You have created the custom field Part color, and you select the option group 'Colors' on the Options by custom field form. Out of all available colors, you only select the values 'Black', 'White' and 'Gray', because the user should only be able to choose from those part colors.