diff --git a/manual/images/invert_polarity.png b/manual/images/invert_polarity.png
new file mode 100644
index 0000000000..a8f43f42bb
Binary files /dev/null and b/manual/images/invert_polarity.png differ
diff --git a/manual/xml/invert_polarity.xml b/manual/xml/invert_polarity.xml
new file mode 100644
index 0000000000..fa844ce14a
--- /dev/null
+++ b/manual/xml/invert_polarity.xml
@@ -0,0 +1,36 @@
+
+
+
+%BOOK_ENTITIES;
+
+]>
+
+
+ Inverting the Polarity of a Track
+
+ The polarity of a track can be inverted in the Mixer Window by clicking
+ on the track name button of a Mixer Strip and choosing
+ Invert Polarity.
+
+
+
+
+
+
+
+ When the polarity of a track is inverted a Ø will
+ appear before the track name in the Mixer Strip.
+
+
+
+ This could be used to correct the polarity of an input signal due to
+ incorrect wiring or to prevent two signals that are out of phase with
+ respect to each other resulting in cancellation when mixing.
+
+
+
diff --git a/manual/xml/mixer_strips.xml b/manual/xml/mixer_strips.xml
index b381ced49a..a9028bad48 100644
--- a/manual/xml/mixer_strips.xml
+++ b/manual/xml/mixer_strips.xml
@@ -109,17 +109,8 @@
leaving the number of ports untouched.
-
-
-
+