diff --git a/Ninjacrab.PersistentWindows.Solution/Common/HotKeyWindow.cs b/Ninjacrab.PersistentWindows.Solution/Common/HotKeyWindow.cs
index 78788d0..abf9e8c 100644
--- a/Ninjacrab.PersistentWindows.Solution/Common/HotKeyWindow.cs
+++ b/Ninjacrab.PersistentWindows.Solution/Common/HotKeyWindow.cs
@@ -6,7 +6,6 @@ using System.Data;
 using System.Drawing;
 using System.Linq;
 using System.Text;
-using System.Threading.Tasks;
 using System.Windows.Forms;
 using System.Runtime.InteropServices;
 
@@ -632,7 +631,6 @@ namespace PersistentWindows.Common
                     active = false;
                 }
             }
-
         }
 
 
diff --git a/Ninjacrab.PersistentWindows.Solution/SystrayShell/HotKey.cs b/Ninjacrab.PersistentWindows.Solution/SystrayShell/HotKey.cs
index 5363fe0..c2f7df2 100644
--- a/Ninjacrab.PersistentWindows.Solution/SystrayShell/HotKey.cs
+++ b/Ninjacrab.PersistentWindows.Solution/SystrayShell/HotKey.cs
@@ -1,6 +1,8 @@
 using System;
 using System.Threading;
 using System.Windows.Forms;
+using System.Diagnostics;
+using System.IO;
 
 using PersistentWindows.Common;
 using PersistentWindows.Common.WinApiBridge;
@@ -10,6 +12,7 @@ namespace PersistentWindows.SystrayShell
 {
     public class HotKeyForm : Form
     {
+        static bool init = true;
         static HotKeyWindow hkwin = null;
         static Thread messageLoop;
 
@@ -63,6 +66,18 @@ namespace PersistentWindows.SystrayShell
                 Program.HideRestoreTip(false); //hide icon
                 Program.HideRestoreTip(); //show icon
                 hkwin.HotKeyPressed(from_menu : false);
+                if (init)
+                {
+                    init = false;
+                    string webpage_commander_notification = Path.Combine(Program.AppdataFolder, "webpage_commander_notification");
+                    if (!File.Exists(webpage_commander_notification))
+                    {
+                        File.Create(webpage_commander_notification);
+                        Process.Start(Program.ProjectUrl + "/blob/master/webpage_commander.md");
+                    }
+                    Program.systrayForm.notifyIconMain.ShowBalloonTip(5000, $"webpage commander is invoked via hotkey", "Press the hotkey (Alt + W) again to revoke", ToolTipIcon.Info);
+                }
+
                 return;
             }
             else if (m.Msg == 0x0010 || m.Msg == 0x0002)
diff --git a/Ninjacrab.PersistentWindows.Solution/SystrayShell/Program.cs b/Ninjacrab.PersistentWindows.Solution/SystrayShell/Program.cs
index 10c9c1d..4c2d408 100644
--- a/Ninjacrab.PersistentWindows.Solution/SystrayShell/Program.cs
+++ b/Ninjacrab.PersistentWindows.Solution/SystrayShell/Program.cs
@@ -29,7 +29,7 @@ namespace PersistentWindows.SystrayShell
         private const int MaxSnapshots = 38; // 0-9, a-z, ` and final one for undo
 
         static PersistentWindowProcessor pwp = null;    
-        static SystrayForm systrayForm = null;
+        public static SystrayForm systrayForm = null;
         static bool silent = false; //suppress all balloon tip & sound prompt
         static bool notification = false; //pop balloon when auto restore
         static int delay_manual_capture = 5000; //in millisecond
diff --git a/webpage_commander.md b/webpage_commander.md
index 4a97516..d1234ae 100644
--- a/webpage_commander.md
+++ b/webpage_commander.md
@@ -1,5 +1,5 @@
 
-### Webpage commander window is activated via hotkey (Alt + W)
-* If the activation is unintentional, press the hotkey again to deactivate webpage commander. This feature can be disabled via PW menu or command line.
-* Webpage commander improves the efficiency of web browsing using single-letter command shortcut
-* Check out online help for more details
\ No newline at end of file
+### Webpage commander window is invoked via hotkey (Alt + W)
+* If the invocation is unintentional, press the hotkey again to revoke webpage commander. The hotkey can be disabled via PW menu or command line.
+* Webpage commander improves the efficiency of web browsing using single-letter command shortcut.
+* Check out [Online Help](https://www.github.com/kangyu-california/PersistentWindows/blob/master/Help.md) for detailed instructions.
\ No newline at end of file