diff --git a/release/preview-template.zip b/release/preview-template.zip
index 61c4583..6f44c21 100644
Binary files a/release/preview-template.zip and b/release/preview-template.zip differ
diff --git a/release/preview-template/index.ejs b/release/preview-template/index.ejs
index 376b983..d5f2e10 100644
--- a/release/preview-template/index.ejs
+++ b/release/preview-template/index.ejs
@@ -25,7 +25,7 @@
                 <div class="contentWrap">
                     <div id="GameDiv" class="wrapper">
                         <div id="Cocos3dGameContainer">
-                            <canvas id="GameCanvas"></canvas>
+                            <canvas id="GameCanvas" tabindex="-1" style="background-color: '';"></canvas>
                         </div>
                         <div id="splash">
                             <div class="progress-bar stripes"><span></span></div>
@@ -50,26 +50,26 @@
 </html>
 
 <script>
-    document.getElementsByClassName('toolbar')[0].insertAdjacentHTML('afterbegin', '<div><button id="btn-show-tree">Tree</button></div>');
-    const devtoolsBtn = document.getElementById('btn-show-tree');
-    let isOpen = !!localStorage.getItem('ccc_devtools_show');
-    toggle(isOpen);
-    devtoolsBtn.addEventListener('click', () => {
-        isOpen = !isOpen;
-        toggle(isOpen);
-    }, false);
+    // document.getElementsByClassName('toolbar')[0].insertAdjacentHTML('afterbegin', '<div><button id="btn-show-tree">Tree</button></div>');
+    // const devtoolsBtn = document.getElementById('btn-show-tree');
+    // let isOpen = !!localStorage.getItem('ccc_devtools_show');
+    // toggle(isOpen);
+    // devtoolsBtn.addEventListener('click', () => {
+    //     isOpen = !isOpen;
+    //     toggle(isOpen);
+    // }, false);
 
-    function toggle(isOpen) {
-        const devApp = document.getElementById('dev-app');
-        window.ccdevShow = isOpen;
-        if (isOpen) {
-            devApp.style.display = 'flex';
-            devtoolsBtn.classList.add('checked');
-            localStorage.setItem('ccc_devtools_show', 1);
-        } else {
-            devApp.style.display = 'none';
-            devtoolsBtn.classList.remove('checked');
-            localStorage.removeItem('ccc_devtools_show');
-        }
-    }
+    // function toggle(isOpen) {
+    //     const devApp = document.getElementById('dev-app');
+    //     window.ccdevShow = isOpen;
+    //     if (isOpen) {
+    //         devApp.style.display = 'flex';
+    //         devtoolsBtn.classList.add('checked');
+    //         localStorage.setItem('ccc_devtools_show', 1);
+    //     } else {
+    //         devApp.style.display = 'none';
+    //         devtoolsBtn.classList.remove('checked');
+    //         localStorage.removeItem('ccc_devtools_show');
+    //     }
+    // }
 </script>