diff --git a/external-title.html b/external-title.html
index 190993e..0f77bc7 100644
--- a/external-title.html
+++ b/external-title.html
@@ -54,7 +54,9 @@
                 ipc.send("external-title-resize", largerSpanW + 16);
             } else turnSmallerResizer();
             titleNode.parentNode.removeChild(n);
-            titleNode.style.width = spanW + 'px'
+            titleNode.style.width = spanW + 'px';
+
+            ipc.send("sync-timer-win-title", { title: titleNode.value, notes: notesNode.value })
         }
 
         let notesNode = document.getElementById("notes");
@@ -75,7 +77,9 @@
                 ipc.send("external-title-resize", largerSpanW + 16);
             } else turnSmallerResizer();
             notesNode.parentNode.removeChild(n);
-            notesNode.style.width = spanW + 'px'
+            notesNode.style.width = spanW + 'px';
+
+            ipc.send("sync-timer-win-title", { title: titleNode.value, notes: notesNode.value })
         }
 
         function turnSmallerResizer() {
diff --git a/main.js b/main.js
index 8c16f0b..31ec322 100644
--- a/main.js
+++ b/main.js
@@ -1849,6 +1849,23 @@ ipcMain.on("open-external-title-win", function (event, message) {
     externalTitle(title, notes);
 })
 
+ipcMain.on("modify-external-title-win", function (event, message) {
+    if (externalTitleWin != null)
+        externalTitleWin.webContents.send('send-title', {
+            title: message.title,
+            notes: message.notes
+        });
+})
+
+ipcMain.on("sync-timer-win-title", function (event, message) {
+    if (win != null && isTimerWin) {
+        win.webContents.send('sync-title', {
+            title: message.title,
+            notes: message.notes
+        })
+    }
+})
+
 ipcMain.on("external-title-resize", function (event, message) {
     if (externalTitleWin != null) {
         externalTitleWin.setSize(Math.floor(Number(message)), 84);
diff --git a/timer.html b/timer.html
index a83facd..6549083 100644
--- a/timer.html
+++ b/timer.html
@@ -50,16 +50,28 @@
         </div>
         <div id="timer" class="justify-content-center align-content-center text-center">
             <input type="text" id="title" class="text-center h4" maxlength="14"
-                   style="transform: translateX(5px); font-size: 0.4rem" />
+                   style="transform: translateX(5px); font-size: 0.4rem" oninput="modifyExternalTitleWin()" />
             <a href="javascript:openExternalTitleWin()" id="external" class="work"><i
                     class="iconfont icon-external-link"></i></a><br />
             <input type="text" id="notes" class="text-center small text-muted" maxlength="39"
-                   style="font-size: 0.4rem" /><br id="notes-space" />
+                   style="font-size: 0.4rem" oninput="modifyExternalTitleWin()" /><br id="notes-space" />
             <script>
                 function openExternalTitleWin() {
                     ipc.send("open-external-title-win", { title: $("#title").val(), notes: $("#notes").val() });
                 }
 
+                function modifyExternalTitleWin() {
+                    ipc.send("modify-external-title-win", { title: $("#title").val(), notes: $("#notes").val() });
+                }
+
+                ipc.on("sync-title", function (event, message) {
+                    $("#title").val(message.title);
+                    $("#notes").val(message.notes);
+
+                    titleNodeResizer();
+                    notesNodeResizer();
+                });
+
                 $("#external").attr('title', i18n.__('external-title'));
                 $("#title").attr('title', i18n.__('title-edit-msg'));
                 $("#notes").attr('title', i18n.__('notes-edit-msg'));