Thanks, everyone! I'm not sure if I can explain my method or not, and Jim's tutorial might be an easier way. Basically, I create a duplicate layer, then use the marquee tool to select the part of the image that stays "in the box", then I select "Inverse" , then "delete" (making sure that my background color is white). Working on the background layer, I then use the eraser to quickly and neatly erase most of the image, so that the frame I created in the duplicate layer shows through, and very carefully erase with a fine brush to leave the head or hoof or whatever part I want going out of the frame. Hope that makes sense, or perhaps others than expand on my explanation.
Just perfect Cindy !!!!!! Takes a perfect image for this treatment and you got it By itself is an exceptional image with your PS work just fantastic Big thanks for the how to !!! Big Time Congrats !!!!