diff --git a/app/src/main/java/org/solovyev/android/calculator/BaseActivity.java b/app/src/main/java/org/solovyev/android/calculator/BaseActivity.java
index 149c416a..d48433c4 100644
--- a/app/src/main/java/org/solovyev/android/calculator/BaseActivity.java
+++ b/app/src/main/java/org/solovyev/android/calculator/BaseActivity.java
@@ -1,23 +1,24 @@
 package org.solovyev.android.calculator;
 
+import static org.solovyev.android.calculator.App.cast;
+
 import android.os.Bundle;
 import android.support.annotation.LayoutRes;
 import android.support.v7.app.AppCompatActivity;
 import android.view.KeyEvent;
 import android.view.MenuItem;
+
 import org.solovyev.android.calculator.view.Tabs;
 
 import javax.annotation.Nonnull;
 
-import static org.solovyev.android.calculator.App.cast;
-
 public class BaseActivity extends AppCompatActivity {
 
     @Nonnull
     protected final ActivityUi ui;
 
     public BaseActivity() {
-        this(R.layout.activity_empty);
+        this(R.layout.activity_tabs);
     }
 
     public BaseActivity(@LayoutRes int layout) {
diff --git a/app/src/main/java/org/solovyev/android/calculator/preferences/PreferencesActivity.java b/app/src/main/java/org/solovyev/android/calculator/preferences/PreferencesActivity.java
index 1eacd3dc..a24c3480 100644
--- a/app/src/main/java/org/solovyev/android/calculator/preferences/PreferencesActivity.java
+++ b/app/src/main/java/org/solovyev/android/calculator/preferences/PreferencesActivity.java
@@ -7,7 +7,13 @@ import android.os.Bundle;
 import android.support.annotation.StringRes;
 import android.support.annotation.XmlRes;
 import android.util.SparseArray;
-import org.solovyev.android.calculator.*;
+
+import org.solovyev.android.calculator.ActivityUi;
+import org.solovyev.android.calculator.App;
+import org.solovyev.android.calculator.AppComponent;
+import org.solovyev.android.calculator.BaseActivity;
+import org.solovyev.android.calculator.Preferences;
+import org.solovyev.android.calculator.R;
 import org.solovyev.android.checkout.ActivityCheckout;
 import org.solovyev.android.checkout.Billing;
 import org.solovyev.android.checkout.Checkout;
@@ -16,8 +22,6 @@ import org.solovyev.android.checkout.Products;
 import javax.annotation.Nonnull;
 import javax.inject.Inject;
 
-import static android.support.v7.app.ActionBar.NAVIGATION_MODE_STANDARD;
-
 public class PreferencesActivity extends BaseActivity implements SharedPreferences.OnSharedPreferenceChangeListener {
 
     static final String EXTRA_PREFERENCE = "preference";
@@ -44,6 +48,10 @@ public class PreferencesActivity extends BaseActivity implements SharedPreferenc
     @Inject
     Products products;
 
+    public PreferencesActivity() {
+        super(R.layout.activity_empty);
+    }
+
     @Nonnull
     static SparseArray<PrefDef> getPreferences() {
         return preferences;
diff --git a/app/src/main/res/layout-land/activity_empty.xml b/app/src/main/res/layout-land/activity_tabs.xml
similarity index 97%
rename from app/src/main/res/layout-land/activity_empty.xml
rename to app/src/main/res/layout-land/activity_tabs.xml
index dc12f1d4..c69c26f9 100644
--- a/app/src/main/res/layout-land/activity_empty.xml
+++ b/app/src/main/res/layout-land/activity_tabs.xml
@@ -43,7 +43,7 @@
         <android.support.v7.widget.Toolbar
             android:id="@+id/toolbar"
             android:layout_width="match_parent"
-            android:layout_height="wrap_content"
+            android:layout_height="?actionBarSize"
             app:layout_scrollFlags="snap">
 
             <android.support.design.widget.TabLayout
diff --git a/app/src/main/res/layout/activity_empty.xml b/app/src/main/res/layout/activity_empty.xml
index b0e93f1b..c3087597 100644
--- a/app/src/main/res/layout/activity_empty.xml
+++ b/app/src/main/res/layout/activity_empty.xml
@@ -22,43 +22,14 @@
   ~ Site:  http://se.solovyev.org
   -->
 
-<android.support.design.widget.CoordinatorLayout
+<LinearLayout
     android:id="@+id/main"
     style="@style/CppMain"
     xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:orientation="vertical">
 
-    <android.support.v4.view.ViewPager
-        android:id="@+id/viewPager"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        app:layout_behavior="@string/appbar_scrolling_view_behavior" />
-
-    <android.support.design.widget.AppBarLayout
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content">
-
-        <android.support.v7.widget.Toolbar
-            android:id="@+id/toolbar"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            app:layout_scrollFlags="scroll|enterAlways" />
-
-        <android.support.design.widget.TabLayout
-            android:id="@+id/tabs"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:overScrollMode="never"
-            app:tabGravity="fill"
-            app:tabMaxWidth="0dp"
-            app:tabMode="fixed" />
-
-    </android.support.design.widget.AppBarLayout>
-
-    <android.support.design.widget.FloatingActionButton
-        android:id="@+id/fab"
-        style="@style/CppFab"/>
-
-</android.support.design.widget.CoordinatorLayout>
\ No newline at end of file
+    <android.support.v7.widget.Toolbar
+        android:id="@+id/toolbar"
+        android:layout_height="?actionBarSize"
+        android:layout_width="match_parent" />
+</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_tabs.xml b/app/src/main/res/layout/activity_tabs.xml
new file mode 100644
index 00000000..9fcc5115
--- /dev/null
+++ b/app/src/main/res/layout/activity_tabs.xml
@@ -0,0 +1,64 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright 2013 serso aka se.solovyev
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~    http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~
+  ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~ Contact details
+  ~
+  ~ Email: se.solovyev@gmail.com
+  ~ Site:  http://se.solovyev.org
+  -->
+
+<android.support.design.widget.CoordinatorLayout
+    android:id="@+id/main"
+    style="@style/CppMain"
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <android.support.v4.view.ViewPager
+        android:id="@+id/viewPager"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior" />
+
+    <android.support.design.widget.AppBarLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+
+        <android.support.v7.widget.Toolbar
+            android:id="@+id/toolbar"
+            android:layout_width="match_parent"
+            android:layout_height="?actionBarSize"
+            app:layout_scrollFlags="scroll|enterAlways" />
+
+        <android.support.design.widget.TabLayout
+            android:id="@+id/tabs"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:overScrollMode="never"
+            app:tabGravity="fill"
+            app:tabMaxWidth="0dp"
+            app:tabMode="fixed" />
+
+    </android.support.design.widget.AppBarLayout>
+
+    <android.support.design.widget.FloatingActionButton
+        android:id="@+id/fab"
+        style="@style/CppFab"/>
+
+</android.support.design.widget.CoordinatorLayout>
\ No newline at end of file