1. Navigate to the ch2-page-header-output folder of the WordPress plugin directory of your development installation.
2. Open the ch2-page-header-output.php file in a text editor.
3. Find the ch2pho_settings_menu function in the existing code.
4. Modify the code to store the return value of the add_options_page function call to a variable:

$options_page = 
    add_options_page( 'My Google Analytics Configuration', 
                      'My Google Analytics',
                      'manage_options',
                      'ch2pho-my-google-analytics',
                      'ch2pho_config_page' );

5. Add the following block of code to the ch2pho_settings_menu function to register an action that will be called when the plugin's options page is loaded:

if ( !empty( $options_page ) ) {
    add_action( 'load-' . $options_page, 'ch2pho_help_tabs' );
}

6. Add the following code at the end of the plugin file to implement the newly declared ch2pho_help_tabs function:

function ch2pho_help_tabs() {
    $screen = get_current_screen();
    $screen->add_help_tab( array(
            'id'       => 'ch2pho-plugin-help-instructions',
            'title'    => 'Instructions',
            'callback' => 'ch2pho_plugin_help_instructions',
        ) );
   
    $screen->add_help_tab( array(
             'id'       => 'ch2pho-plugin-help-faq',
             'title'    => 'FAQ',
             'callback' => 'ch2pho_plugin_help_faq',
        ) );
     
    $screen->set_help_sidebar( '<p>This is the sidebar
        content</p>' );
}

7. Add the following code section to provide an implementation for the ch2pho_plugin_help_instructions function:

function ch2pho_plugin_help_instructions() { ?>
    <p>These are instructions explaining how to use this 
       plugin.</p>
<?php }

8. Add the following code section to provide an implementation for the ch2pho_plugin_help_faq function:

function ch2pho_plugin_help_faq() { ?>
    <p>These are the most frequently asked questions on the use of
       this plugin.</p>
<?php }

9. Save and close the plugin file.
10. Click on the Settings section of the administration menu.
11. Click on the My Google Analytics menu to display the plugin configuration page. You will now see a Help tab appear in the top-right corner of the page.
12. Click on the Help tab to see all of the help content that has been added to the plugin.