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-rw-r--r--manual/xml/invert_polarity.xml3
1 files changed, 3 insertions, 0 deletions
diff --git a/manual/xml/invert_polarity.xml b/manual/xml/invert_polarity.xml
index 4cc2e9d430..353c05bd40 100644
--- a/manual/xml/invert_polarity.xml
+++ b/manual/xml/invert_polarity.xml
@@ -9,6 +9,9 @@
<section id="sn-invert-polarity">
<title>Inverting the Polarity of a Track</title>
+ <indexterm>
+ <primary>Polarity</primary>
+ </indexterm>
<para>
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