Now you can very easily integrate a customizable fancybox in your WordPress site. All you need to do is install and activate the popular WordPress plugin called FancyBox for WordPress and that’s all. It automatically starts working soon after activation but still there are many customization options where you can set your own parameters. The plugin allows you make almost any customization which you can think about.
You can customize the border, margin width and color, zoom speed, animation type, close button position, overlay color and opacity including more advanced option like options to group images into galleries, and much more.
By default it uses jQuery for applying FancyBox to any thumbnails that links directly to an image. It includes posts, the sidebar, etc etc.