Crop Photos in the Windows 8.1 Photos App
Decide whether to save the newly cropped image as a new photo or as the original photo.
The Photos app offers two choices when you’re saving your new image. For the safest option, choose Save a Copy. That saves your cropped version but preserves the original just in case you want to crop it again to a different size. Choose Update Original only if you want to apply your changes to the original photo and don’t care if you may want to change it down the road.