Crooked scan — we've got the fix for you (Photoshop)

Oftentimes, when scanning an image, the picture shifts on the scan bed (or maybe you put it there at a slight angle) and you don't notice until after you've scanned it. Seeing that you'll probably have to crop in on the image as well, save time by cropping and straightening simultaneously. To do so, select the Crop tool from the Toolbox. Then, drag the cropping border where you want it. Now, drag the pointer just outside of the cropping border. Upon doing so, your pointer changes to a twoheaded arrow, allowing you to rotate the cropping border to fit your image. Then, when you press [enter] to apply the crop, your image will be straight too.