What’s the fastest way to straighten a crooked or tilted photograph? This is one of those classic bread-and-butter Photoshop tips that sometimes slips through even the most experienced designer’s bag of tricks.

Select the tape measure tool (it shares space with the eyedropper in Photoshop’s toolbox) and drag a line across part of your image that should be straight horizontal or vertical. Then choose Image > Rotate Canvas > Arbitrary.

Photoshop auto-calculates the value required to straighten your image. Click OK and your image is all squared up.