Cropping allows you to select only the best part of a photo, and iPhoto makes cropping simple. By cropping a photo, you can make your photo more dramatic, or get closer to the subject in your photo.
iPhoto contains a list of many common crop settings that you may want to use to ensure your photos dont get distorted when you need specific dimensions, like a 5" x 7" print or a postcard.
Once youve selected an area to crop, you can move the crop area to capture exactly the part you want. Select the crop area, and then hold the mouse button down while you position the crop area. When you are done, click the Crop button to crop your image.
What if you dont like the crop you just made to your photo? You can undo your last crop by selecting Undo from the Edit menu. This will restore your image to how it looked originally. Also, you can use the Revert to Original command under the Photos menu, but note this will undo all changes youve made to a photo, not just your cropping changes.
When you crop an image, youre throwing away data, which makes your photo smaller. This might be exactly what you want, if youre sending a cropped photo in email or posting it to a web page. But if you want to produce a high-quality print of your cropped photo, you may need to settle for a smaller version of that photo.
When making changes to a photo, its a good idea to first duplicate the original, because the photo will be changed in your photo library, and in any albums that contain the photo. Making a duplicate also means that youll have a "before" and "after" version of the photo in your photo library. To do this, first select a photo to duplicate. Then, from the Photos menu, choose Duplicate, select the duplicate photo, and then type a new name for it in the Title field.
Depending on the dimensions of your photo, iPhoto will constrain the crop area with landscape or portrait settings. For example, if you have a group photo taken in landscape orientation, iPhoto will constrain the crop area with landscape settings. You can change the crop area orientation to portrait by selecting Constrain as portrait from the Constrain menu. Now when you select an item from the Constrain menu, your selection area will be in portrait orientation.
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