Index: wp-admin/includes/template.php
===================================================================
--- wp-admin/includes/template.php	(revision 20834)
+++ wp-admin/includes/template.php	(working copy)
@@ -1708,6 +1708,8 @@
 			'post-new.php' => 'wp330_media_uploader',
 			'post.php'     => 'wp330_media_uploader',
 			'themes.php'   => array( 'wp330_saving_widgets', 'wp340_customize_current_theme_link' ),
+			'appearance_page_custom-header' => 'wp340_choose_image_from_library',
+			'appearance_page_custom-background' => 'wp340_choose_image_from_library',
 		);
 
 		// Check if screen related pointer is registered
@@ -1720,6 +1722,7 @@
 			'wp330_media_uploader' => array( 'upload_files' ),
 			'wp330_saving_widgets' => array( 'edit_theme_options', 'switch_themes' ),
 			'wp340_customize_current_theme_link' => array( 'edit_theme_options' ),
+			'wp340_choose_image_from_library' => array( 'edit_theme_options' ),
 		);
 
 		// Get dismissed pointers
@@ -1845,6 +1848,21 @@
 	}
 
 	/**
+	 * Print 'New Feature: Choose Image from Library' for 3.4.0.
+	 *
+	 * @since 3.4.0
+	 */
+	public static function pointer_wp340_choose_image_from_library() {
+		$content  = '<h3>' . __( 'New Feature: Choose Image from Library' ) . '</h3>';
+		$content .= '<p>' . __( 'Want to use an image you uploaded earlier? Select it from your media library instead of uploading it again.' ) . '</p>';
+
+		WP_Internal_Pointers::print_js( 'wp340_choose_image_from_library', '#choose-from-library-link', array(
+			'content'  => $content,
+			'position' => array( 'edge' => 'top', 'align' => is_rtl() ? 'right' : 'left' ),
+		) );
+	}
+
+	/**
 	 * Prevents new users from seeing existing 'new feature' pointers.
 	 *
 	 * @since 3.3.0
Index: wp-admin/custom-header.php
===================================================================
--- wp-admin/custom-header.php	(revision 20834)
+++ wp-admin/custom-header.php	(working copy)
@@ -588,7 +588,7 @@
 		$image_library_url = remove_query_arg( 'TB_iframe', $image_library_url );
 		$image_library_url = add_query_arg( array( 'context' => 'custom-header', 'TB_iframe' => 1 ), $image_library_url );
 	?>
-	<span class="howto"><?php _ex( 'or', 'Custom Header: Choose an image from your computer - or - Choose from image library' ); ?></span> <a class="thickbox" href="<?php echo $image_library_url; ?>"><?php _e( 'Choose from image library' ); ?></a>
+	<span class="howto"><?php _ex( 'or', 'Custom Header: Choose an image from your computer - or - Choose from image library' ); ?></span> <a class="thickbox" id="choose-from-library-link" href="<?php echo $image_library_url; ?>"><?php _e( 'Choose from image library' ); ?></a>
 </td>
 </tr>
 <?php endif; ?>
Index: wp-admin/custom-background.php
===================================================================
--- wp-admin/custom-background.php	(revision 20834)
+++ wp-admin/custom-background.php	(working copy)
@@ -260,7 +260,7 @@
 	$image_library_url = add_query_arg( array( 'context' => 'custom-background', 'TB_iframe' => 1 ), $image_library_url );
 ?>
 	</form>
-	<span class="howto"><?php _ex( 'or', 'Custom Background: Choose an image from your computer - or - Choose from image library' ); ?></span> <a class="thickbox" href="<?php echo $image_library_url; ?>"><?php _e( 'Choose from image library' ); ?></a>
+	<span class="howto"><?php _ex( 'or', 'Custom Background: Choose an image from your computer - or - Choose from image library' ); ?></span> <a id="choose-from-library-link" class="thickbox" href="<?php echo $image_library_url; ?>"><?php _e( 'Choose from image library' ); ?></a>
 </td>
 </tr>
 </tbody>