Crop and Straighten Example

In order to crop and straighten this photo, I first opened up Photoshop and opened my photo. Then, I set the ratio to "square", and went to work decided where I'd like my crop to take place. Once I was decided, I hit the crop button again to finalize my crop. In order to straighten my photo, I hit the "straighten" button at the top bar of the crop section, and used my mouse to draw a line across the horizon. I then hit the crop button again to finalize my straightening.