This shot of the courtyard of the Louvre is obviously tilted, perhaps the result of too much French wine. Lets first add some canvas all around to give us some room to work. This is optional but you may find it easier to work with.First take our cropping tool, pull it over the entire image and then use the mouse to pull out the handles on either of the opposite corners. Click on it and we have some additional canvas.
Underneath the Eyedropper tool, you will find the Ruler. Select it and use it to draw a line across two points of the correct level horizon. You click on one end and with the mouse button held down move to the other end. When you release it you have a line showing. I’ve done mine through the larger pyramid so you can see it (Below).
Go to our commands of Image>> Rotate Canvas>> Arbitrary. You will see a number in the dialog box which represents the angle our ruler is on. In our example below, it is 2.22 Degrees
Now click on OK and Photoshop rotates your image so that your ruler mark is now level, along with your horizon.
Crop and fill in blank canvas to suit your composition and you are done. It takes me far longer to write this than to actually do it. A little practice and you’ll be able to do it in no time.
This tutorial is a part of the Photoshop Workflow Series
All Images are Available for Licensing at Singular Video&Pix