PERSPECTIVE CORRECTION
Deal with converging verticals and leaning buildings in an instant
The Perspective section of Perspective Efex enables you to correct issues resulting from shooting buildings from an angle rather than straight on. It can automatically detect horizontal and vertical lines before rendering them level and creating right-angles. In some instances, however, you may wish to tweak the correction a bit.
With complex images or extreme perspective distortion it’s often best to take control and add some anchor points. After selecting the number of points you want, a series of anchor points and lines appear on your image. You need to drag the anchors to key points in your image so that the lines lie along edges that should be horizontally or vertically level. Hitting Apply makes the correction and crops the image to remove any blank areas.