diff --git a/index.html b/index.html
index 4ea8f18..afd4211 100644
--- a/index.html
+++ b/index.html
@@ -503,7 +503,6 @@
     </block>
   </category> -->
     <category name="ループ" css-icon="customIcon fas fa-redo-alt" categorystyle="loop_category">
-      <label text="Loops" web-icon="&#xf01e;" web-class="blocklyFlyoutHeading"></label>
       <block type="controls_repeat_ext">
         <value name="TIMES">
           <shadow type="math_number">
@@ -541,7 +540,6 @@
       </block>
     </category>
     <category name="数・計算" css-icon="customIcon fas fa-calculator" categorystyle="math_category">
-      <label text="Math" web-icon="&#xf1ec;" web-class="blocklyFlyoutHeading"></label>
       <block type="math_number">
         <field name="NUM">0</field>
       </block>
@@ -601,7 +599,6 @@
       <block type="math_random_float"></block>
     </category>
     <category name="文字列" css-icon="customIcon fas fa-font" categorystyle="text_category">
-      <label text="Text" web-icon="&#xf031;" web-class="blocklyFlyoutHeading"></label>
       <block type="text">
         <field name="TEXT"></field>
       </block>
@@ -650,7 +647,6 @@
       </block>
     </category>
     <category name="リスト" css-icon="customIcon fas fa-list-ol" categorystyle="list_category">
-      <label text="List" web-icon="&#xf0cb;" web-class="blocklyFlyoutHeading"></label>
       <block type="lists_create_with">
         <mutation items="0"></mutation>
       </block>
@@ -707,8 +703,7 @@
     </category>
     <sep></sep>
     <category name="GPIO" colour="%{BKY_UGJ_GPIO_HUE}" css-icon="customIcon fab fa-raspberry-pi">
-      <label text="GPIO" web-icon="&#xf2db;" web-class="blocklyFlyoutHeading"></label>
-      <label text="基本" web-line="4.0" web-line-width="200"></label>
+      <label text="基本"></label>
       <block type="ugj_gpio_start"></block>
       <block type="ugj_gpio_stop"></block>
       <block type="ugj_gpio_setoutput">
@@ -852,10 +847,9 @@
       <block type="ugj_gpio_sleep">
         <field name="sec">1</field>
       </block>
-      <label text="" web-line="4.0" web-line-width="200"></label>
+      <label text="_" web-line="4.0" web-line-width="200"></label>
     </category>
     <category name="マルチメディア" colour="%{BKY_UGJ_MULTIMEDIA_HUE}" css-icon="customIcon fas fa-calculator">
-      <label text="Multimedia" web-icon="&#xf11b;" web-class="blocklyFlyoutHeading"></label>
       <label text="キャンバス" web-line="4.0" web-line-width="200"></label>
       <block type="ugj_canvas_init"></block>
       <block type="ugj_canvas_clearrect">
@@ -1009,11 +1003,10 @@
       <block type="ugj_tfpredict_predict">
         <field name="result" id="!=~_{T-;nZXP-rWM|beL" variabletype="">結果</field>
       </block>
-      <label text="" web-line="4.0" web-line-width="200"></label>
+      <label text="_" web-line="4.0" web-line-width="200"></label>
     </category>
 
     <category name="ネットワーク" colour="%{BKY_UGJ_NETWORK_HUE}" css-icon="customIcon fas fa-wifi">
-      <label text="Network" web-icon="&#xf1eb;" web-class="blocklyFlyoutHeading"></label>
       <label text="基本" web-line="4.0" web-line-width="200"></label>
       <block type="ugj_network_axios_geturl">
         <value name="url">
@@ -1083,10 +1076,9 @@
       <block type="ugj_skyway_eventsend">
         <field name="data" id="vN/_]nnKA$wVHSxh2_9f" variabletype="">内容</field>
       </block>
-      <label text="" web-line="4.0" web-line-width="200"></label>
+      <label text="_" web-line="4.0" web-line-width="200"></label>
     </category>
     <category name="特殊" colour="%{BKY_UGJ_SPECIAL_HUE}" css-icon="customIcon fas fa-plug">
-      <label text="Special" web-icon="&#xf1e6;" web-class="blocklyFlyoutHeading"></label>
       <label text="出入力" web-line="4.0" web-line-width="200"></label>
       <block type="ugj_canvas_say">
         <value name="say">
@@ -1310,7 +1302,7 @@
       <block type="ugj_child_debug">
         <value name="cmd">
       </block>
-      <label text="" web-line="4.0" web-line-width="200"></label>
+      <label text="_" web-line="4.0" web-line-width="200"></label>
     </category>
   </xml>
 
diff --git a/index.js b/index.js
index 1fce04f..1445cc3 100644
--- a/index.js
+++ b/index.js
@@ -16,6 +16,7 @@ function createWindow() {
     height: 600,
     webPreferences: {
       nodeIntegration: true,
+      contextIsolation: false,
       enableRemoteModule: true
     }
   })
@@ -77,6 +78,27 @@ app.on('ready', () => {
             win.reload();
           },
           accelerator: "F5"
+        },
+        {
+          label: 'About',
+          click: () => {
+            var os = require('os');
+            var detail = 'Version: ' + process.env.npm_package_version + '\n'
+              + 'Node.js: ' + process.versions.node + '\n'
+              + 'Chrome: ' + process.versions.chrome + '\n'
+              + 'Electron: ' + process.versions.electron + '\n'
+              + 'V8: ' + process.versions.v8 + '\n'
+              + 'OS: ' + os.type + ' ' + os.arch + ' ' + os.version + ' ' + os.release;
+            var options = {
+              type: 'info',
+              buttons: ['OK'],
+              title: 'OCoGe',
+              message: 'OCoGe - Oiwa Code Generator',
+              detail: detail
+            };
+            require('electron').dialog.showMessageBox(win, options);
+          },
+          accelerator: "CommandOrControl+I"
         }
       ]
     }