When you edit smart art, you get a text box that pops up. Using that at any level you can move an element (and its children) by pressing Shift-Alt-ArrowKeys. Use Shift-Alt-Up or Shift-Alt-Down within a branch. Use Shift-Alt-Left to give someone a promotion. Use Shift-Alt-Right to make them work for the person above them.

So if you want someone to move from Team A to Team B you hold Shift-Alt and press Left, Down, Right

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Andrew Lockton
Chrysalis Design, Melbourne Australia