WordPress.org

1. Upload the full directory into your wp-content/plugins directory
2. Activate the plugin at the plugin administration page
3. Insert this: <?php if(function_exists('wptextsizerincutil')) { wptextsizerincutil(); } ?> where you would like the sizer icons to appear.
4. this Plugin is so simple, it doesn't require any additional configuration.

NOTE: Some text will not resize if it uses an absolute size (pt) rather than a relative size in the CSS.
This plugin will only resize text elements within the "content" div tag. If you are not using a div tag called "content" this plugin will not work for you.