diff --git a/app/src/layout/Wnd.ts b/app/src/layout/Wnd.ts
index 62f34cb57..30eeeb349 100644
--- a/app/src/layout/Wnd.ts
+++ b/app/src/layout/Wnd.ts
@@ -874,6 +874,9 @@ export class Wnd {
         }
         tab.parent = this;
         hideAllElements(["toolbar"]);
+        /// #if !BROWSER
+        setTabPosition();
+        /// #endif
     }
 
     public split(direction: TDirection) {
diff --git a/app/src/layout/getAll.ts b/app/src/layout/getAll.ts
index 2872d5537..b110bacbe 100644
--- a/app/src/layout/getAll.ts
+++ b/app/src/layout/getAll.ts
@@ -11,6 +11,7 @@ import {Bookmark} from "./dock/Bookmark";
 import {Tag} from "./dock/Tag";
 import {Custom} from "./dock/Custom";
 import {Protyle} from "../protyle";
+import {Wnd} from "./Wnd";
 
 export const getAllEditor = () => {
     const models = getAllModels();
@@ -96,6 +97,17 @@ export const getAllModels = () => {
     return models;
 };
 
+export const getAllWnds = (layout: Layout, wnds: Wnd[]) => {
+    for (let i = 0; i < layout.children.length; i++) {
+        const item = layout.children[i];
+        if (item instanceof Wnd) {
+            wnds.push(item);
+        } else if (item instanceof Layout) {
+            getAllWnds(item, wnds);
+        }
+    }
+};
+
 export const getAllTabs = () => {
     const tabs: Tab[] = [];
     const getTabs = (layout: Layout) => {
diff --git a/app/src/menus/tab.ts b/app/src/menus/tab.ts
index cc80f1bb6..29ce0ddc0 100644
--- a/app/src/menus/tab.ts
+++ b/app/src/menus/tab.ts
@@ -9,6 +9,7 @@ import {copySubMenu} from "./commonMenuItem";
 import {App} from "../index";
 import {Layout} from "../layout";
 import {Wnd} from "../layout/Wnd";
+import {getAllWnds} from "../layout/getAll";
 
 const closeMenu = (tab: Tab) => {
     const unmodifiedTabs: Tab[] = [];
@@ -130,7 +131,9 @@ const splitSubMenu = (app: App, tab: Tab) => {
             }
         });
     }
-    if (tab.parent.parent.children.length > 1) {
+    const wndsTemp: Wnd[] = [];
+    getAllWnds(window.siyuan.layout.layout, wndsTemp);
+    if (wndsTemp.length > 1) {
         subMenus.push({
             label: window.siyuan.languages.unsplit,
             click: () => {
diff --git a/app/src/window/setHeader.ts b/app/src/window/setHeader.ts
index cebde8fb8..65f08d529 100644
--- a/app/src/window/setHeader.ts
+++ b/app/src/window/setHeader.ts
@@ -1,23 +1,11 @@
 import {isWindow} from "../util/functions";
 import {Wnd} from "../layout/Wnd";
-import {Layout} from "../layout";
-import {getAllTabs} from "../layout/getAll";
+import {getAllTabs, getAllWnds} from "../layout/getAll";
 import {Editor} from "../editor";
 import {Asset} from "../asset";
 import {Constants} from "../constants";
 import { ipcRenderer } from "electron";
 
-const getAllWnds = (layout: Layout, wnds: Wnd[]) => {
-    for (let i = 0; i < layout.children.length; i++) {
-        const item = layout.children[i];
-        if (item instanceof Wnd) {
-            wnds.push(item);
-        } else if (item instanceof Layout) {
-            getAllWnds(item, wnds);
-        }
-    }
-};
-
 export const setTabPosition = () => {
     if (!isWindow()) {
         return;