After creating a task, a workflow can be assigned to the task from here.
The workflow assigned to the task, workflow stage and stage resources can be viewed here. Workflows can be assigned to WBS Levels so that it can be inherited to the child tasks but it cannot be started on WBS Levels.
Figure: Task - Workflow
You can carry out the following operations from the workflow window.
For more information on these operations refer Document Details>>Workflow>>Operations from the Workflow window.