Image Zoom is an extension for all Gecko based web browsers. Image Zoom allows the user to change image sizes within a web page. There are several ways the user can zoom images through the interface as well as the ability to zoom single images or an entire page of images.Image zoom is also a term used for displaying a higher resolution 'zoomed' image upon mouseover or mouseclick of an image on a webpage. This effect has been achieved using Java, ActiveX and more recently JavaScript.