This module provides a field formatter to zoom an image while hovering over it. An image style is selected for the default display image, and an additional style is selected to be used as the zoomed image. When a user hovers over the displayed image, the zoomed image appears and is positioned relative to the current mouse position.
This module depends on the core Image module being enabled.
Install the module by following the instructions at http://drupal.org/node/70151
To configure the Image Zoom display, go to Administration > Structure > Content types and select the content type you would want to use Image Zoom with. If you do not already have an Image field defined, add one by going to the Manage Fields tab. After you have an Image field, go to the Manage Display tab. Change the Format for your Image field to Image Zoom. To change which styles are displayed for the displayed image and the zoomed image, click the gear icon at the end of the row, select the desired image styles, and click Update.
Changing default styles
All styles provided by this moodule are able to be overridden to change the position, size, border color, etc... to your liking. To do this, find the css property you would like to change in the css/imagezoom.css file, copy it to your theme's .css file, and change it. Note that any changes you make to the imagezoom.css file will be overwritten when you update the module. Using a css file in your theme prevents this.