diff -r 2bdc3ac5e77c -r 55a55a9ec2c2 src/mainwindow.ui
--- a/src/mainwindow.ui	Sat Aug 24 14:44:42 2019 +0300
+++ b/src/mainwindow.ui	Sun Sep 22 11:51:41 2019 +0300
@@ -13,7 +13,13 @@
   <property name="windowTitle">
    <string>MainWindow</string>
   </property>
-  <widget class="QWidget" name="centralwidget"/>
+  <widget class="QWidget" name="centralwidget">
+   <layout class="QVBoxLayout" name="verticalLayout">
+    <item>
+     <widget class="QTabWidget" name="tabs"/>
+    </item>
+   </layout>
+  </widget>
   <widget class="QMenuBar" name="menubar">
    <property name="geometry">
     <rect>
@@ -27,6 +33,9 @@
     <property name="title">
      <string>File</string>
     </property>
+    <addaction name="actionNewFile"/>
+    <addaction name="actionOpen"/>
+    <addaction name="separator"/>
     <addaction name="actionQuit"/>
    </widget>
    <addaction name="menuFile"/>
@@ -37,6 +46,22 @@
     <string>Quit</string>
    </property>
   </action>
+  <action name="actionOpen">
+   <property name="text">
+    <string>Open…</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+O</string>
+   </property>
+  </action>
+  <action name="actionNewFile">
+   <property name="text">
+    <string>New File</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+N</string>
+   </property>
+  </action>
  </widget>
  <resources/>
  <connections/>