Image zoomer is jQuery zoom tool. The plugin gives any image on your page the ability to be magnified when the mouse rolls over it.
your wordpress admin page > Settings > Image Zoomer, fill the form “Zoomer default power” with an integer greater or equal to 1.
your wordpress admin page > Settings > Image Zoomer, fill the form “Zoomer dimensions” with an integer, the default is 75 means 75×75.
The default settings is your image will be zoomer all, but if you only want some of your image can be zoomer you can do it. First go to image zoomer settings panel “Settings > Image Zoomer”, check with “no” in Option “Zoom all image”. Then open a post that have image you want to zoom. In HTML editor find an image you want to zoom, than add “dwzoom” (without the quotes) to the class of image.
For practical example, please visit the plugin release page