Arranging your task list
You can re-arrange the relationships of tasks in your task list by dragging nodes from one parent to another. When you drag a node that has children, the child nodes will drag along with it.
To turn a root task into a child task, drag it on to its new parent. To turn a child task into a root task, select the task, and click the
button on the Tasks tab of the ribbon.
To re-order sibling tasks, select the task you want to move, and press the
or
button on the Tasks tab on the ribbon.