"I don't understand this comment, Howard. Cropping changes everything without exception. Every photograph without exception is a crop and every photograph without exception can be improved with a different degree of cropping, although it is possible that the scope for improvement might be limited if the image was initially cropped excessively at the time the shot was taken. (That is, cropped too much by the choice of camera format, focal length and distance to the subject)."
Well Ray, I do not agree (never have) that cropping could help every photograph. My comment was intended to give the message that cropping would not change that fact that it is a document of someone else'd art work.