diff --git a/src/gui_qt/_py/basewindow.py b/src/gui_qt/_py/basewindow.py
index d916548..ea0c0f2 100644
--- a/src/gui_qt/_py/basewindow.py
+++ b/src/gui_qt/_py/basewindow.py
@@ -22,8 +22,6 @@ class Ui_BaseWindow(object):
         self.centralwidget = QtWidgets.QWidget(BaseWindow)
         self.centralwidget.setObjectName("centralwidget")
         self.horizontalLayout = QtWidgets.QHBoxLayout(self.centralwidget)
-        self.horizontalLayout.setContentsMargins(3, 3, 3, 3)
-        self.horizontalLayout.setSpacing(3)
         self.horizontalLayout.setObjectName("horizontalLayout")
         self.splitter = QtWidgets.QSplitter(self.centralwidget)
         self.splitter.setOrientation(QtCore.Qt.Horizontal)
@@ -70,8 +68,22 @@ class Ui_BaseWindow(object):
         self.integralwidget = IntegralWidget()
         self.integralwidget.setObjectName("integralwidget")
         self.tabWidget.addTab(self.integralwidget, "")
-        self.area = MdiAreaTile(self.splitter)
+        self.verticalLayoutWidget = QtWidgets.QWidget(self.splitter)
+        self.verticalLayoutWidget.setObjectName("verticalLayoutWidget")
+        self.verticalLayout = QtWidgets.QVBoxLayout(self.verticalLayoutWidget)
+        self.verticalLayout.setContentsMargins(0, 0, 0, 0)
+        self.verticalLayout.setObjectName("verticalLayout")
+        self.widget = EditorWidget(self.verticalLayoutWidget)
+        self.widget.setObjectName("widget")
+        self.verticalLayout.addWidget(self.widget)
+        self.area = MdiAreaTile(self.verticalLayoutWidget)
+        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
+        sizePolicy.setHorizontalStretch(0)
+        sizePolicy.setVerticalStretch(0)
+        sizePolicy.setHeightForWidth(self.area.sizePolicy().hasHeightForWidth())
+        self.area.setSizePolicy(sizePolicy)
         self.area.setObjectName("area")
+        self.verticalLayout.addWidget(self.area)
         self.horizontalLayout.addWidget(self.splitter)
         BaseWindow.setCentralWidget(self.centralwidget)
         self.menubar = QtWidgets.QMenuBar(BaseWindow)
@@ -643,5 +655,6 @@ from ..data.signaledit.editsignalwidget import EditSignalWidget
 from ..data.valueeditwidget import ValueEditWidget
 from ..fit.fitwindow import QFitDialog
 from ..graphs.drawings import DrawingsWidget
+from ..lib.codeeditor import EditorWidget
 from ..lib.mdiarea import MdiAreaTile
 from ..nmr.t1widget import QT1Widget
diff --git a/src/resources/_ui/basewindow.ui b/src/resources/_ui/basewindow.ui
index 01987b8..2c48b6a 100644
--- a/src/resources/_ui/basewindow.ui
+++ b/src/resources/_ui/basewindow.ui
@@ -22,21 +22,6 @@
   </property>
   <widget class="QWidget" name="centralwidget">
    <layout class="QHBoxLayout" name="horizontalLayout">
-    <property name="spacing">
-     <number>3</number>
-    </property>
-    <property name="leftMargin">
-     <number>3</number>
-    </property>
-    <property name="topMargin">
-     <number>3</number>
-    </property>
-    <property name="rightMargin">
-     <number>3</number>
-    </property>
-    <property name="bottomMargin">
-     <number>3</number>
-    </property>
     <item>
      <widget class="QSplitter" name="splitter">
       <property name="orientation">
@@ -125,7 +110,23 @@
         </attribute>
        </widget>
       </widget>
-      <widget class="MdiAreaTile" name="area"/>
+      <widget class="QWidget" name="verticalLayoutWidget">
+       <layout class="QVBoxLayout" name="verticalLayout">
+        <item>
+         <widget class="EditorWidget" name="widget" native="true"/>
+        </item>
+        <item>
+         <widget class="MdiAreaTile" name="area">
+          <property name="sizePolicy">
+           <sizepolicy hsizetype="Preferred" vsizetype="MinimumExpanding">
+            <horstretch>0</horstretch>
+            <verstretch>0</verstretch>
+           </sizepolicy>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </widget>
      </widget>
     </item>
    </layout>
@@ -1086,6 +1087,12 @@
    <header>..lib.mdiarea</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>EditorWidget</class>
+   <extends>QWidget</extends>
+   <header>..lib.codeeditor</header>
+   <container>1</container>
+  </customwidget>
  </customwidgets>
  <resources/>
  <connections>