Straightening Skewed Photos

1. Open photo.
2. Choose the Measure tool on the Photoshop toolbox. Measure the crooked line to be straightened. Go to Image menu then select Rotate Canvas. Choose arbitrary.Rotate Canvas dialog will appear with the value already inputted with the necessary angle correction.
3. Click [OK].
4. Press [C] to select Crop tool and crop to remove the white space on the photo.