Parameter Schemas define the parameter data required by a Template or Template Building Block that is invoked within a Template.
Creating Parameters Schemas You can set parameters for a Template Building Block when you add the Template Building Blocks to your Template. To specify which parameters you can set for a specific Template Building Block, you must create a Parameters Schema.
Selecting parameters for a Template Building Block If you want to pass parameters to a Template Building Block contained within a Template, open the Template Building Block in Content Manager Explorer and select a Parameters Schema you made earlier that defines the parameters for this template.