I've seen a lot of tutorials for creating a magnified view for part of an image, but in the tutorials I found, the magnified view was covering the original part of the image from which the magnified view was taken. Gayle wants the magnified view moved over to the side so you can see it in two sizes at the same time. This tutorial will walk you through the process of doing just that.
I'm using Photoshop CS3 for this tutorial, but you should be able do it in a later version or in a recent older version.
