Via a shortcode and a sidebar widget, the Zoom plugin embeds a text size controller widget in posts, pages and/or the sidebar.
The widget can be used to increase or decrease the size of desired text on a page.
The commercial version of this plugins provides access to extra settings and new controller graphics.
Unpack and upload it to the /wp-content/plugins/ directory.
Activate the plugin through the 'Plugins' menu in WordPress.
Zoom is also available as a Joomla module as well.
· WordPress 3 or higher