I have Photoshop open most of the day and yet, when I need to stretch a photo to fill the entire slide, I almost always use this hack directly in PowerPoint to make it happen without actually distorting the photo.
This also works great when converting a 4:3 presentation to 16:9.
Above is a quick video tutorial on how to do it!
Check out my YouTube Channel for this and more presentation hacks and tutorials.
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