MS Power Point
A chart can be put as a part of the presentation using

Edit -> Chart
View -> Chart
Insert -> Chart
Insert -> Pictures -> Chart

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

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