Documented append_output() in the Output Class.
diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index aef9d71..ceb016c 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -71,6 +71,7 @@
 			<li>Table library will generate an empty cell with a blank string, or NULL value.</li>
 			<li>Added a <kbd>parse_string()</kbd> method to the <a href="libraries/parser.html">Parser Class</a>.</li>
 			<li>Added HTTP headers and Config information to the <a href="general/profiling.html">Profiler</a> output.</li>
+			<li>Documented <kbd>append_output()</kbd> in the <a href="libraries/output.html">Output Class</a>.</li>
 		</ul>
 	</li>
 	<li>Database
diff --git a/user_guide/libraries/output.html b/user_guide/libraries/output.html
index 1e42591..7be42b4 100644
--- a/user_guide/libraries/output.html
+++ b/user_guide/libraries/output.html
@@ -87,6 +87,14 @@
 CodeIgniter functions like <var>$this->load->view()</var>.</p>
 
 
+<h2>$this->output->append_output();</h2>
+
+<p>Appends data onto the output string.  Usage example:</p>
+
+<code>$this->output->append_output($data);</code>
+
+
+
 <h2>$this->output->set_header();</h2>
 
 <p>Permits you to manually set server headers, which the output class will send for you when outputting the final rendered display.  Example:</p>