You can configure the label with shared external parameters of other families. You configure shared parameters before moving them over to the Label Parameters window. The Category Parameters controls aid in this integration:
Add Parameter. Click this button to enter the Parameter Properties dialog. See Adding Shared Parameters to Families. For Generic Annotation families, you can use the Add Parameter button to introduce new Family Parameters to the Generic Annotation family. See Creating Family Parameters and About Parameters.
To delete a shared parameter, see Viewing, Moving, and Deleting Shared Parameters.