Edit the help dropdown

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<?php
add_action('load-page-new.php','add_custom_help_page');
add_action('load-page.php','add_custom_help_page');
function add_custom_help_page() {
   //the contextual help filter
   add_filter('contextual_help','custom_page_help');
}
function custom_page_help($help) {
   //keep the existing help copy
   echo $help;
   //add some new copy
   echo "&lt;h5>Custom Features&lt;/h5>";
   echo "&lt;p>Content placed above the more divider will appear in column 1. Content placed below the divider will appear in column 2.&lt;/p>";
}
?>

Instructions:

The help-dropdown in the Admin Panel can be a useful asset to those who aren’t experst on how to use WordPress. You can easily customize it for a client or such.

Related links:

http://www.smashingmagazine.com/2009/12/14/advanced-power-tips-for-wordpress-template-developers-reloaded/