Magic Thumb requires two images to work. A large image (approx 450-550 pixels height) and a smaller image which will act as the thumbnail (approx 80-120 pixels height). The large image appears when the thumbnail is clicked. The image loads instantly due to the lightbox effect. Perfect for viewing large images. It is easy to install and can be done in a matter of minutes. It works on iPhone, iPad and Android devices as well as every major browser. Feel free to contact us for help. Follow us for the very latest on Facebook: http://www.facebook.com/MagicToolbox and Twitter: http://twitter.com/magictoolbox