The question What things should one take into account when looking at cropping a photo? asks about factors that affect composition during cropping. I'm interested in a very specific sub-set of this, ...
I have a picture that I shot in landscape (4x6 ratio) that I want to crop to portrait (5x7 ratio). I see how I can do a 5x7 landscape or a 4x6 portrait, but not a 5x7 portrait. How do you do this?