Cacher is the code snippet organizer for pro developers

// Add support for after entry widget
add_theme_support( 'genesis-after-entry-widget-area' );

// Remove after entry widget
remove_action( 'genesis_after_entry', 'genesis_after_entry_widget_area' );

// Add after entry widget to posts and pages
add_action( 'genesis_after_entry', 'gecko_after_entry', 9 );
function gecko_after_entry() {

   if ( ! is_singular( array( 'post', 'page' )) )
        return;

        genesis_widget_area( 'after-entry', array(
            'before' => '<div class="after-entry widget-area">',
            'after'  => '</div>',
        ) );

}