diff --git a/src/renderer/src/i18n/locales/en-us.json b/src/renderer/src/i18n/locales/en-us.json
index 60a43839..47668ea3 100644
--- a/src/renderer/src/i18n/locales/en-us.json
+++ b/src/renderer/src/i18n/locales/en-us.json
@@ -244,7 +244,8 @@
       "upgrade.success.button": "Restart",
       "upgrade.success.content": "Please restart the application to complete the upgrade",
       "upgrade.success.title": "Upgrade successfully",
-      "regenerate.confirm": "Regenerating will replace current message"
+      "regenerate.confirm": "Regenerating will replace current message",
+      "copy.success": "Copied!"
     },
     "minapp": {
       "title": "MinApp"
diff --git a/src/renderer/src/i18n/locales/ru-ru.json b/src/renderer/src/i18n/locales/ru-ru.json
index 675d711c..89331f2d 100644
--- a/src/renderer/src/i18n/locales/ru-ru.json
+++ b/src/renderer/src/i18n/locales/ru-ru.json
@@ -244,7 +244,8 @@
       "upgrade.success.button": "Перезапустить",
       "upgrade.success.content": "Пожалуйста, перезапустите приложение для завершения обновления",
       "upgrade.success.title": "Обновление успешно",
-      "regenerate.confirm": "Перегенерация заменит текущее сообщение"
+      "regenerate.confirm": "Перегенерация заменит текущее сообщение",
+      "copy.success": "Скопировано!"
     },
     "minapp": {
       "title": "Встроенные приложения"
diff --git a/src/renderer/src/i18n/locales/zh-cn.json b/src/renderer/src/i18n/locales/zh-cn.json
index 055d040c..7c9a1803 100644
--- a/src/renderer/src/i18n/locales/zh-cn.json
+++ b/src/renderer/src/i18n/locales/zh-cn.json
@@ -244,7 +244,8 @@
       "upgrade.success.button": "重启",
       "upgrade.success.content": "重启用以完成升级",
       "upgrade.success.title": "升级成功",
-      "regenerate.confirm": "重新生成会覆盖当前消息"
+      "regenerate.confirm": "重新生成会覆盖当前消息",
+      "copy.success": "复制成功"
     },
     "minapp": {
       "title": "小程序"
diff --git a/src/renderer/src/i18n/locales/zh-tw.json b/src/renderer/src/i18n/locales/zh-tw.json
index d583e87a..4aa29292 100644
--- a/src/renderer/src/i18n/locales/zh-tw.json
+++ b/src/renderer/src/i18n/locales/zh-tw.json
@@ -244,7 +244,8 @@
       "upgrade.success.button": "重新啟動",
       "upgrade.success.content": "請重新啟動應用以完成升級",
       "upgrade.success.title": "升級成功",
-      "regenerate.confirm": "重新生成會覆蓋當前訊息"
+      "regenerate.confirm": "重新生成會覆蓋當前訊息",
+      "copy.success": "複製成功"
     },
     "minapp": {
       "title": "小程序"
diff --git a/src/renderer/src/pages/home/Markdown/MermaidPopup.tsx b/src/renderer/src/pages/home/Markdown/MermaidPopup.tsx
index c626c1c2..7fc15fd9 100644
--- a/src/renderer/src/pages/home/Markdown/MermaidPopup.tsx
+++ b/src/renderer/src/pages/home/Markdown/MermaidPopup.tsx
@@ -17,6 +17,7 @@ const PopupContainer: React.FC<Props> = ({ resolve, chart }) => {
   const [open, setOpen] = useState(true)
   const { t } = useTranslation()
   const mermaidId = `mermaid-popup-${Date.now()}`
+  const [activeTab, setActiveTab] = useState('preview')
 
   const onOk = () => {
     setOpen(false)
@@ -86,6 +87,11 @@ const PopupContainer: React.FC<Props> = ({ resolve, chart }) => {
     }
   }
 
+  const handleCopy = () => {
+    navigator.clipboard.writeText(chart)
+    window.message.success(t('message.copy.success'))
+  }
+
   useEffect(() => {
     window?.mermaid?.contentLoaded()
   }, [])
@@ -101,11 +107,18 @@ const PopupContainer: React.FC<Props> = ({ resolve, chart }) => {
       centered
       footer={[
         <Space key="download-buttons">
-          <Button onClick={() => handleDownload('svg')}>{t('mermaid.download.svg')}</Button>
-          <Button onClick={() => handleDownload('png')}>{t('mermaid.download.png')}</Button>
+          {activeTab === 'source' && <Button onClick={() => handleCopy()}>{t('common.copy')}</Button>}
+          {activeTab === 'preview' && (
+            <>
+              <Button onClick={() => handleDownload('svg')}>{t('mermaid.download.svg')}</Button>
+              <Button onClick={() => handleDownload('png')}>{t('mermaid.download.png')}</Button>
+            </>
+          )}
         </Space>
       ]}>
       <Tabs
+        activeKey={activeTab}
+        onChange={(key) => setActiveTab(key)}
         items={[
           {
             key: 'preview',
diff --git a/src/renderer/src/store/settings.ts b/src/renderer/src/store/settings.ts
index 78dc05f0..ad233b34 100644
--- a/src/renderer/src/store/settings.ts
+++ b/src/renderer/src/store/settings.ts
@@ -51,7 +51,7 @@ const initialState: SettingsState = {
   proxyMode: 'system',
   proxyUrl: undefined,
   userName: '',
-  showMessageDivider: false,
+  showMessageDivider: true,
   messageFont: 'system',
   showInputEstimatedTokens: false,
   tray: true,