We’ve done this tutorial before, but thought we would do a revisit. :) Usually when straightening, there are several different ways to do it (in Adobe Camera Raw ACR or Lightroom LR) but today we are going to do it in Photoshop.
We’ll take this photo:
and straighten the horizon some to this:
So first of all, I want to say that this photo wasn’t that crooked and this method is best for photos that just need a slight adjustment. You’ll see why.
First step: Find your ruler tool as shown below.
With the ruler tool, draw a line on the horizon line (the real horizon). It doesn’t have to be a long line.
Then go to Image>Image Rotation>Arbitrary and click OK in the box that pops up. You don’t need to make any adjustments to it at all.
This is what happens after you click OK… (this is why I said the smaller the adjustment the better. 
)
After that I crop out the white areas and call it good. Hope this helps Happy Monday!!
