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diff --git a/info/blueshift.texinfo b/info/blueshift.texinfo
index a112a93..f398c3b 100644
--- a/info/blueshift.texinfo
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@@ -648,6 +648,11 @@ the first parameter is the signal that is received
(an integer), and zero if @kbd{Control+c} has been
pressed.
+Similarly @code{signal_SIGUSR1} and @code{signal_SIGUSR2}
+are invoked when the programs received a SIGUSR1 signal or
+a SIGUSR2 signal, respectively. SIGUSR1 reloads the
+configurations and SIGUSR2 enables or disables Blueshift.
+
To run in continuous mode, you must implement the
function @code{periodically}. It takes 8 positional
arguments: