Open PPT, create a new blank slideshow, add the original to edit,
Select the added shape for any polygon
Hold down the left mouse button to draw at will, and finally press ESC [final finalization,
What is more needed may be a regular figure, which can be clicked on the starting point, released, and finally converge into a square in the form of a dot to return to the starting point, becoming the area you need to focus on.
You can also add color, border, transparency, and more for that graphic.
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