Photoshop has a great automation tool called Crop and Straighten, which
can be a lifesaver if you capture a photo with your scanner and then discover that
the picture wasn’t squarely lined up on the scanner bed. You can also use this tool
to fix digital photos you might have taken with the camera held askew. This one’s
so easy that I’ll simply provide a list of the steps to carry out. There are no dialog
boxes to mess with, or any other parameters to choose.
Just follow these steps:
1. Load the image you want to realign into Photoshop. The feature works best with images that have clearly
defined horizontal and vertical lines at the edges.
2. Use Image > Canvas Size and add some space around the photo to give
Photoshop some working room.
3. Choose File > Automate > Crop and Straighten Photos. Photoshop rotates
your image to straighten it, then crops around the vertical and horizontal borders
it used to align the image.
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