If the TimeLiner window is not already open, click Home tab Tools panel TimeLiner.
In the TimeLiner window Task tab, click the tasks you want to move:
Click Indent to indent the selected tasks by one level in the task hierarchy
Click Outdent to outdent the selected tasks by one level in the task hierarchy
Note: If the selected tasks contain child tasks, then the child tasks will be moved with the summary tasks, and their relationship maintained. If indenting or outdenting of tasks results in a task becoming a summary task, then it will lose any costs assigning to it and take on the costs of its child tasks.