To define summary tasks and subtasks:
Click the indent/outdent toolbar buttons,
Alternatively, right-click on the item's ID number and choose Indent or Outdent from the shortcut menu.
After you click on the Indent or Outdent buttons, the project schedule the timing and sequence of task within a project. A schedule contains tasks with dependencies, as well as other project information. is automatically recalculated.
See also
Overview of RiskyProject Workflow