MS Power Point
What is the use of Researching Timings?

This option allows you to set the time of animations
There is no such option in PowerPoint
This option allows you to rearrange slides
This option allows you to rehearsal of slide presentation

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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 & 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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