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diff --git a/documentation/adt-manual/adt-prepare.xml b/documentation/adt-manual/adt-prepare.xml
index 260e1f18a0..3d0cfd42fb 100644
--- a/documentation/adt-manual/adt-prepare.xml
+++ b/documentation/adt-manual/adt-prepare.xml
@@ -709,6 +709,45 @@
     </para>
 </section>
 
+<section id='optionally-using-an-external-toolchain'>
+    <title>Optionally Using an External Toolchain</title>
+
+    <para>
+        You might want to use an external toolchain as part of your
+        development.
+        If this is the case, the fundamental steps you need to accomplish
+        are as follows:
+        <itemizedlist>
+            <listitem><para>
+                Understand where the installed toolchain resides.
+                For cases where you need to build the external toolchain, you
+                would need to take separate steps to build and install the
+                toolchain.
+                </para></listitem>
+            <listitem><para>
+                Make sure you add the layer that contains the toolchain to
+                your <filename>bblayers.conf</filename> file through the
+                <ulink url='&YOCTO_DOCS_REF_URL;#var-BBLAYERS'><filename>BBLAYERS</filename></ulink>
+                variable.
+                </para></listitem>
+            <listitem><para>
+                Set the
+                <ulink url='&YOCTO_DOCS_REF_URL;#var-EXTERNAL_TOOLCHAIN'><filename>EXTERNAL_TOOLCHAIN</filename></ulink>
+                variable in your <filename>local.conf</filename> file
+                to the location in which you installed the toolchain.
+                </para></listitem>
+        </itemizedlist>
+        A good example of an external toolchain used with the Yocto Project
+        is <trademark class='registered'>Mentor Graphics</trademark>
+        Sourcery G++ Toolchain.
+        You can see information on how to use that particular layer in the
+        <filename>README</filename> file at
+        <ulink url='http://github.com/MentorEmbedded/meta-sourcery/'></ulink>.
+        You can find further information by reading about the
+        <ulink url='&YOCTO_DOCS_REF_URL;#var-TCMODE'><filename>TCMODE</filename></ulink>
+        variable in the Yocto Project Reference Manual's variable glossary.
+    </para>
+</section>
 </chapter>
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