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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MS Power Point
You have got a bunch of digital holiday photo you want to put into a slide show. What the quickest method?

Apply a multiple-picture layout to several slides, and use the clipart icon on the slides to import your picture
All of the listed here
On the insert menu, point to the picture, click from file, and select your picture in a group for each slide
On the insert menu, point the picture and click new photo album

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