update audio alert info

diff --git a/en/manual.xml b/en/manual.xml
index 31ae201..adb4c26 100644 (file)
--- a/en/manual.xml
+++ b/en/manual.xml
@@ -20140,6 +20140,10 @@ location: [STAFF, ISO]</programlisting>Will block items with an itype code of
           selector box.  For example if you enter
           <programlisting id="comment_text_146">body:contains('Check in message')</programlisting></para>
         <para>Then when you visit the checkin page you will hear an alert.</para>
+        <para>Every page in Koha has a unique ID in the body tag which can be used to limit a sound
+          to a specific page </para>
+        <para>Any ID selector (where html contains id="name_of_id" ) and can also be a trigger as:
+          #name_of_selector </para>
       </section>
     </section>
   </chapter>