I got lost reading this article about processing jpgs using Camera Raw. I primarily use Lightroom and have processed some jpgs with it, dating from the early days before I swapped to saving raw file data. I have installed (not used) Photoshop so "how to" beginner articles are interesting to look at. Unfortunately the article lost me more or less totally, especially the box under "filter individual channels" which meant not a jot. It seems that if you know enough about photoshop to understand then the article itself is redundant. Also the lead picture, used again as example in "Perspective Corrections". What is it? A photograph? Graphic Art? It looks like a double exposure that has been painted over with a crayon leaving only the sky looking as if it came out of a camera. It is quite nice but I don't see what it has to do with the article.