When you select shapes for resizing inside PowerPoint, most shapes will show eight resizing handles and a single rotation handle. In addition, some shapes also have yellow Square / Diamond handles which enable you to change the appearance of the selected shape. Using these Square / Diamond handles, you can use PowerPoint’s smiling face shape, and make it a frowning face!
The way you use these yellow diamond handles to resize shapes is more or less the same across various PowerPoint versions:
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