--- a/src/upmpdcli.conf
+++ b/src/upmpdcli.conf
@@ -64,6 +64,13 @@
 # #!/bin/sh (or whatever) in the headline.
 # onstop =
 
+# Run a command when volume is changed. Specify the full path to the program,
+# e.g. /usr/bin/logger. Executable scripts work, but must have a #!/bin/sh (or
+# whatever) in the headline.
+# The command is called with the volume as the first argument, e.g.
+# <command> 85.
+# onvolumechange =
+
 # Mimimum interval (Seconds) between 2 saves of the cache. Setting this may
 # improve playlist load speed on a slow device. The default is to start a
 # new save as soon as the previous one is done (if the list changed again