Changing Start/End Dates in Subtasks Automaticall

I have many tasks set in PRoject 2000, each with 5-8 subtasks.

Is there any way to simply DRAG AND DROP the main TASK to a different start date, so that the subtask dates move automatically...keeping their respective timefram assignments?

So far, I can only do this by manually changing or draging and dropping the dates for each individual subtask.

Thanks