In some work environments many clients or projects have similar tasks hierarchies. For this case a task hierarchy may be copied from one item to another.
Click down on the task to copy. Hold the CTRL key and drag the task to a new parent task. Any child tasks will also be copied including billing rate information. Time, Expense and To Do entries will not be copied.
When copying tasks, you have to keep tasks in a descending hierarchy. This means you may have to change the task levels of tasks before copying or allow Timeless Time & Expense to automatically change the task level for the copied items.