https://macmost.com/e-1637 Learn how to crop your pictures in the Mac Photos app. You can drag the edges to redefine the cropping area and then reposition the picture inside the new area. You can also rotate or auto-rotate the image and the crop will adjust automatically to not leave any blank space in the corners. Cropping is non-destructive, so you can always revert to the original photo or export it.
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