Here – http://www.nuvuthemes.com/extensions/tofullscreen/
Wordpress toFullscreen plugin adds a button to the top left of all pages allowing the user to quickly go into fullscreen mode.
- Compatible with Firefox and Chrome – In Opera, Safari and IE the plugin alerts the user to press the F11 key to toggle fullscreen mode. – Not compatible in mobile devices.
- Integrates the jQuery Fullscreen plugin 2012 by Klaus Reimer into WordPress – https://github.com/kayahr/jquery-fullscreen-plugin
- WordPress 3.5.1 compatible
- Change the color and size of the button in the built in options page. Color choices are(black, brown, yellow, green, purple, pink, blue, teal, red, grey, orange) – Sizes (small, normal, large)
- No shortcodes – Works site wide. Just activate the plugin and it’s on all your pages.