In this how-to video, you will learn how to straighten crooked photos in Photoshop. First, open the photo you want to straighten in Photoshop. Next, use the ruler tool under the eye dropper tool. Select it and zoom in to an area. Find a crooked line to straighten, such as a building rooftop or ground line of some sort. Click, hold, and drag. Next, zoom out. Go to image, image rotation, and arbitrary. Click okay and your image will be adjusted. Go to the crop tool and crop out the spaces. Hit enter to complete the crop. You picture is now straight.