diff --git a/README.md b/README.md
index f5e1695..59c8cbc 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,7 @@ Features
 --------
 - Get the jobs done quicker than ever
 - Keeps you free like a dog
+- Able to show remaining time
 
 
 Installation
diff --git a/config.def.h b/config.def.h
index 32ec45c..89f722f 100644
--- a/config.def.h
+++ b/config.def.h
@@ -1,7 +1,7 @@
 /* See LICENSE file for copyright and license details. */
 
 /* Notification */
-static char *notifycmd = "libnotify"; /* Use built-in libnotify if empty */
+static char *notifycmd = "libnotify"; /* Use libnotify or given command */
 static char *notifyext = ""; /* Notify with extra command (eg. play an alarm) */
 
 /*
diff --git a/spt.1 b/spt.1
index e672ef0..05a286c 100644
--- a/spt.1
+++ b/spt.1
@@ -12,6 +12,12 @@ spt \- simple pomodoro timer
 .B spt
 is a simple timer that uses pomodoro technique with desktop notification to
 double your efficiency.
+
+To check the remaining time, send USR1 signal to spt by:
+
+.RS
+.B pkill -USR1 spt
+.RE
 .SH OPTIONS
 .TP
 .BI \-e " notifyext"
@@ -36,8 +42,10 @@ with subsequent rests in between
 and
 followed by a long rest
 .RB ( "15 min." )
+.B in an infinite loop
 .SH EXAMPLES
 Use system notify_send and play a music without libnotify:
+
 .RS
 .B spt -e 'aplay alarm.wav' -n 'notify-send'
 .RE