diff --git a/Ink Canvas/Helpers/LogHelper.cs b/Ink Canvas/Helpers/LogHelper.cs
index 0e1129b2..a2c6ce66 100644
--- a/Ink Canvas/Helpers/LogHelper.cs	
+++ b/Ink Canvas/Helpers/LogHelper.cs	
@@ -1,5 +1,7 @@
 using System;
+using System.Diagnostics;
 using System.IO;
+using System.Threading;
 
 namespace Ink_Canvas.Helpers
 {
@@ -14,24 +16,19 @@ namespace Ink_Canvas.Helpers
 
         public static void NewLog(Exception ex)
         {
-
+            if (ex == null) return;
+            var stackTrace = ex.StackTrace ?? "<no stack trace>";
+            var msg = $"[Exception] Type: {ex.GetType().FullName}\nMessage: {ex.Message}\nStackTrace: {stackTrace}";
+            if (ex.InnerException != null)
+            {
+                msg += $"\nInnerException: {ex.InnerException.GetType().FullName} - {ex.InnerException.Message}\n{ex.InnerException.StackTrace}";
+            }
+            WriteLogToFile(msg, LogType.Error);
         }
 
         public static void WriteLogToFile(string str, LogType logType = LogType.Info)
         {
-            string strLogType = "Info";
-            switch (logType)
-            {
-                case LogType.Event:
-                    strLogType = "Event";
-                    break;
-                case LogType.Trace:
-                    strLogType = "Trace";
-                    break;
-                case LogType.Error:
-                    strLogType = "Error";
-                    break;
-            }
+            string strLogType = logType.ToString();
             try
             {
                 var file = App.RootPath + LogFile;
@@ -39,16 +36,30 @@ namespace Ink_Canvas.Helpers
                 {
                     Directory.CreateDirectory(App.RootPath);
                 }
-                StreamWriter sw = new StreamWriter(file, true);
-                sw.WriteLine(string.Format("{0} [{1}] {2}", DateTime.Now.ToString("O"), strLogType, str));
-                sw.Close();
+                var threadId = Thread.CurrentThread.ManagedThreadId;
+                var callingMethod = new StackTrace(2, true).GetFrame(0);
+                string callerInfo = "<unknown>";
+                if (callingMethod != null)
+                {
+                    var method = callingMethod.GetMethod();
+                    if (method != null)
+                    {
+                        var className = method.DeclaringType != null ? method.DeclaringType.FullName : "<no class>";
+                        callerInfo = $"{className}.{method.Name}";
+                    }
+                }
+                string logLine = string.Format("{0} [T{1}] [{2}] [{3}] {4}", DateTime.Now.ToString("O"), threadId, strLogType, callerInfo, str);
+                using (StreamWriter sw = new StreamWriter(file, true))
+                {
+                    sw.WriteLine(logLine);
+                }
             }
             catch { }
         }
 
         internal static void WriteLogToFile(string v, object warning)
         {
-            throw new NotImplementedException();
+            WriteLogToFile($"[Warning] {v}", LogType.Warning);
         }
 
         public enum LogType
diff --git a/Ink Canvas/Windows/RandWindow.xaml b/Ink Canvas/Windows/RandWindow.xaml
index 62dddffb..253d13d4 100644
--- a/Ink Canvas/Windows/RandWindow.xaml	
+++ b/Ink Canvas/Windows/RandWindow.xaml	
@@ -106,7 +106,7 @@
                             <Viewbox Margin="0,10">
                                 <ui:SymbolIcon Symbol="Globe" Foreground="White"/>
                             </Viewbox>
-                            <TextBlock Text="调用外部点名" Foreground="White" FontSize="22" Margin="-1,-1,4,0" VerticalAlignment="Center"/>
+                            <TextBlock Text="ClassIsland点名" Foreground="White" FontSize="18" Margin="-1,-1,4,0" VerticalAlignment="Center"/>
                         </ui:SimpleStackPanel>
                     </Border>
                 </ui:SimpleStackPanel>
diff --git a/Ink Canvas/Windows/RandWindow.xaml.cs b/Ink Canvas/Windows/RandWindow.xaml.cs
index b061c064..631af792 100644
--- a/Ink Canvas/Windows/RandWindow.xaml.cs	
+++ b/Ink Canvas/Windows/RandWindow.xaml.cs	
@@ -207,8 +207,20 @@ namespace Ink_Canvas {
             Close();
         }
 
+        private bool isIslandCallerFirstClick = true;
+
         private void BorderBtnIslandCaller_MouseUp(object sender, MouseButtonEventArgs e)
         {
+            if (isIslandCallerFirstClick)
+            {
+                MessageBox.Show(
+                    "首次使用ClassIsland点名功能，请确保已安装ClassIsland和Island caller插件。\n" +
+                    "如未安装，请前往官网下载并安装后再使用。",
+                    "提示", MessageBoxButton.OK, MessageBoxImage.Information);
+                isIslandCallerFirstClick = false;
+                return;
+            }
+
             try
             {
                 System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo
diff --git a/Ink Canvas/obj/Debug/net472/InkCanvasForClass.csproj.AssemblyReference.cache b/Ink Canvas/obj/Debug/net472/InkCanvasForClass.csproj.AssemblyReference.cache
index ef098d71..f9524d04 100644
Binary files a/Ink Canvas/obj/Debug/net472/InkCanvasForClass.csproj.AssemblyReference.cache and b/Ink Canvas/obj/Debug/net472/InkCanvasForClass.csproj.AssemblyReference.cache differ
diff --git a/Ink Canvas/obj/Debug/net472/InkCanvasForClass.g.resources b/Ink Canvas/obj/Debug/net472/InkCanvasForClass.g.resources
index 096bb1e4..04f1ddd7 100644
Binary files a/Ink Canvas/obj/Debug/net472/InkCanvasForClass.g.resources and b/Ink Canvas/obj/Debug/net472/InkCanvasForClass.g.resources differ
diff --git a/Ink Canvas/obj/Debug/net472/Windows/RandWindow.g.cs b/Ink Canvas/obj/Debug/net472/Windows/RandWindow.g.cs
index bc5d3198..75a000f4 100644
--- a/Ink Canvas/obj/Debug/net472/Windows/RandWindow.g.cs	
+++ b/Ink Canvas/obj/Debug/net472/Windows/RandWindow.g.cs	
@@ -1,4 +1,4 @@
-#pragma checksum "..\..\..\..\Windows\RandWindow.xaml" "{ff1816ec-aa5e-4d10-87f7-6f4963833460}" "695B3561F1F2C3284724BFAA9122C85C2EF5221A"
+#pragma checksum "..\..\..\..\Windows\RandWindow.xaml" "{ff1816ec-aa5e-4d10-87f7-6f4963833460}" "A29F1514A9DC6332F074303F230464CD5C24A898"
 //------------------------------------------------------------------------------
 // <auto-generated>
 //     此代码由工具生成。
diff --git a/Ink Canvas/obj/Debug/net472/Windows/RandWindow.g.i.cs b/Ink Canvas/obj/Debug/net472/Windows/RandWindow.g.i.cs
index bc5d3198..75a000f4 100644
--- a/Ink Canvas/obj/Debug/net472/Windows/RandWindow.g.i.cs	
+++ b/Ink Canvas/obj/Debug/net472/Windows/RandWindow.g.i.cs	
@@ -1,4 +1,4 @@
-#pragma checksum "..\..\..\..\Windows\RandWindow.xaml" "{ff1816ec-aa5e-4d10-87f7-6f4963833460}" "695B3561F1F2C3284724BFAA9122C85C2EF5221A"
+#pragma checksum "..\..\..\..\Windows\RandWindow.xaml" "{ff1816ec-aa5e-4d10-87f7-6f4963833460}" "A29F1514A9DC6332F074303F230464CD5C24A898"
 //------------------------------------------------------------------------------
 // <auto-generated>
 //     此代码由工具生成。