Maintenance of Tab Page Control
Use
On this tab page you can process the technical settings for the form step. Once you have completed the tab page Form, this tab page contains the entries required to execute the form step.
Activities
Make the following settings:
Task
This field must contain a task with which a form can be executed. There is a SAP task available for the each of the actions on the tab page Form. You should only use a task of your own if you want to restrict the selection of
possible agents or display another text in the work item preview. Select
to create a new task on the basis of the SAP task.
The properties and task description of the chosen task are displayed.
Step properties
You can define the following step properties:
You can determine which task is used dynamically. To do this, select 
and specify the container element that references the alternative task. This task must be a task that is suitable for the action and should be developed from a copy of the SAP task.
If the indicator is set, processing can be rejected in the Business Workplace. The workflow definition is extended by the addition of a branch in which you must model the reaction to this rejection.
You can only set this indicator if you have entered a Complete Execution condition on the Conditions tab page. If the condition is set and if the evaluation of the condition returns the result False, the recipients are determined again. If the actual agent of the work item is the recipient again, the work item remains in the status in process. Otherwise, the newly determined recipients receive the work item.
If the actual agent of the preceding step is also a recipient of this step, the step is executed immediately. The execution does not need to be started in the Business Workplace. For more information, see Advancing With Immediate Dialog.
Binding
Process the binding between task container and workflow container. This is necessary if the agent is to create a document that is based on a template as an attachment, and if text variables are used in the task description. To do this, select 
Binding (exists).