MS Power Point
You can add multiple subordinates to a position by

Clicking the subordinate button as many times as the desired boxes
All of the listed here
Clicking the subordinate button as you press and hold shift
Clicking the subordinate button each and every time you add a subordinate

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MS Power Point
To maintain the perspective (height and width ratio) of an object when resizing, you need to

Drag a corner sizing handle
Press and hold the shift key while dragging a corner sizing handle
Press and hold the shift key while dragging a corner sizing handle & Drag a corner sizing handle
Press and hold the alt + ctrl keys while dragging a middle handle

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