MS Power Point
In order to edit a chart, you can

triple click the chart object
double click the chart object
click and drag the chart object
click the chart objects

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

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
Press and hold the shift key while dragging a corner sizing handle & Drag a corner sizing handle

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