Display the Create New Task Definition dialog Components > [selected component] > Tasks > Create New Task Definition [button].
Name the task then select a template from the Template Name field.
The individual tasks map to the notification scheme used by the application (see Notifications). If a scheme is not specified, the default scheme is used. The available notification schemes are:
ApplicationDeploymentFailure
ApprovalCreated
TaskCreated
ProcessRequestStarted
DeploymentReadied
ApplicationDeploymentSuccess
Approval Failed