• Tutorials
  • Jan1

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    Say you’ve scanned in an image, and it’s important to have the edges (or some other part of the image) perfectly vertical, or horizontal. But the original image you scanned from was not perfectly lined up on the scanner. What’s to be done?

    Well, you could open the image in Photoshop, go to Image>Rotate Canvas>Arbitrary… and fiddle with small amounts until it looks correct. But there is a more elegant solution, though it is not readily obvious by looking through the program’s features.

    First, select the ruler tool.

    Screen shot 2013-05-18 at 3.46.06 PM

    Then click and drag from one end of the edge you want to straighten to the other end:

    Screen shot 2013-05-18 at 3.54.16 PM

    Now, as you may have done before, go to Image>Rotate Canvas>Arbitrary… But this time, you will find a surprise waiting for you:

    Screen shot 2013-05-18 at 3.57.52 PM

    The rotation angle required to straighten the image is automatically filled in!
    Click “OK” and your image is now straightened.

    This will work for both horizontal or vertical edges, depending whether the ruler line is drawn at greater or less than 45 degrees. The rotation will also create excess areas around the image, but you can crop that off as desired. Happy Straightening!