diff --git a/app/src/main/java/org/solovyev/android/calculator/BaseFragment.java b/app/src/main/java/org/solovyev/android/calculator/BaseFragment.java
index 54b0050a..8f3eb063 100644
--- a/app/src/main/java/org/solovyev/android/calculator/BaseFragment.java
+++ b/app/src/main/java/org/solovyev/android/calculator/BaseFragment.java
@@ -27,7 +27,7 @@ public abstract class BaseFragment extends Fragment {
 
     @Nonnull
     protected final FragmentUi createUi(@Nonnull FragmentTab tab) {
-        return new FragmentUi(tab.layout, tab.title);
+        return new FragmentUi(tab.layout);
     }
 
     protected void inject(@Nonnull AppComponent component) {
diff --git a/app/src/main/java/org/solovyev/android/calculator/CalculatorActivity.java b/app/src/main/java/org/solovyev/android/calculator/CalculatorActivity.java
index 60d16e82..a6c889e9 100644
--- a/app/src/main/java/org/solovyev/android/calculator/CalculatorActivity.java
+++ b/app/src/main/java/org/solovyev/android/calculator/CalculatorActivity.java
@@ -204,10 +204,6 @@ public class CalculatorActivity extends BaseActivity implements SharedPreference
         return ViewConfiguration.get(this).hasPermanentMenuKey();
     }
 
-    private boolean isMultiPane() {
-        return findViewById(R.id.main_second_pane) != null;
-    }
-
     @Override
     public boolean onKeyDown(int keyCode, KeyEvent event) {
         if (keyCode == KeyEvent.KEYCODE_BACK) {
diff --git a/app/src/main/java/org/solovyev/android/calculator/DisplayFragment.java b/app/src/main/java/org/solovyev/android/calculator/DisplayFragment.java
index 6f0309cb..351c3644 100644
--- a/app/src/main/java/org/solovyev/android/calculator/DisplayFragment.java
+++ b/app/src/main/java/org/solovyev/android/calculator/DisplayFragment.java
@@ -96,7 +96,7 @@ public class DisplayFragment extends BaseFragment implements View.OnClickListene
     @Nonnull
     @Override
     protected FragmentUi createUi() {
-        return new FragmentUi(R.layout.cpp_app_display, R.string.result);
+        return new FragmentUi(R.layout.cpp_app_display);
     }
 
     @Override
diff --git a/app/src/main/java/org/solovyev/android/calculator/EditorFragment.java b/app/src/main/java/org/solovyev/android/calculator/EditorFragment.java
index 2d5591d2..85bf428c 100644
--- a/app/src/main/java/org/solovyev/android/calculator/EditorFragment.java
+++ b/app/src/main/java/org/solovyev/android/calculator/EditorFragment.java
@@ -65,7 +65,7 @@ public class EditorFragment extends BaseFragment {
     @Nonnull
     @Override
     protected FragmentUi createUi() {
-        return new FragmentUi(R.layout.cpp_app_editor, R.string.editor);
+        return new FragmentUi(R.layout.cpp_app_editor);
     }
 
     @Override
diff --git a/app/src/main/java/org/solovyev/android/calculator/FragmentUi.java b/app/src/main/java/org/solovyev/android/calculator/FragmentUi.java
index 87654e02..9e696e71 100644
--- a/app/src/main/java/org/solovyev/android/calculator/FragmentUi.java
+++ b/app/src/main/java/org/solovyev/android/calculator/FragmentUi.java
@@ -26,7 +26,6 @@ import android.support.v4.app.Fragment;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
-import android.widget.TextView;
 import butterknife.Bind;
 import butterknife.ButterKnife;
 import org.solovyev.android.checkout.CppCheckout;
@@ -36,37 +35,21 @@ import org.solovyev.android.checkout.ProductTypes;
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 import javax.inject.Inject;
-import java.util.Locale;
 
 import static org.solovyev.android.calculator.App.cast;
 
 public class FragmentUi {
     private final int layoutId;
-    private final int titleId;
-
     @Nullable
     private Boolean adFree = null;
-
     @Inject
     CppCheckout checkout;
     @Nullable
-    @Bind(R.id.fragment_title)
-    TextView fragmentTitle;
-    @Nullable
     @Bind(R.id.admob)
     AdView adView;
 
     public FragmentUi(int layoutId) {
-        this(layoutId, View.NO_ID);
-    }
-
-    public FragmentUi(int layoutId, int titleId) {
         this.layoutId = layoutId;
-        this.titleId = titleId;
-    }
-
-    public boolean isPane(@Nonnull Fragment fragment) {
-        return fragment.getActivity() instanceof CalculatorActivity;
     }
 
     public void onCreate(@Nonnull Fragment fragment) {
@@ -113,14 +96,6 @@ public class FragmentUi {
         } else if (adView != null) {
             updateAdView();
         }
-
-        if (titleId != View.NO_ID && fragmentTitle != null) {
-            if (isPane(fragment)) {
-                fragmentTitle.setText(fragment.getString(titleId).toUpperCase(Locale.getDefault()));
-            } else {
-                fragmentTitle.setVisibility(View.GONE);
-            }
-        }
     }
 
     public void onDestroy() {
diff --git a/app/src/main/res/layout-land/main_calculator.xml b/app/src/main/res/layout-land/main_calculator.xml
index b926befe..ce0282ae 100644
--- a/app/src/main/res/layout-land/main_calculator.xml
+++ b/app/src/main/res/layout-land/main_calculator.xml
@@ -21,11 +21,64 @@
   ~ Email: se.solovyev@gmail.com
   ~ Site:  http://se.solovyev.org
   -->
-<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
-    a:id="@+id/main"
+<LinearLayout a:id="@+id/main"
     style="@style/CppMain"
+    xmlns:a="http://schemas.android.com/apk/res/android"
     a:orientation="vertical">
 
-    <include layout="@layout/main_first_pane" />
+    <LinearLayout
+        a:id="@+id/editor"
+        a:layout_width="match_parent"
+        a:layout_height="0dp"
+        a:layout_weight="2"
+        a:orientation="horizontal" />
+
+    <LinearLayout
+        a:id="@+id/partial_keyboard"
+        a:layout_width="match_parent"
+        a:layout_height="0dp"
+        a:layout_weight="1"
+        a:baselineAligned="false"
+        a:orientation="horizontal">
+
+        <include
+            layout="@layout/cpp_app_button_left"
+            a:layout_width="0dp"
+            a:layout_height="match_parent"
+            a:layout_weight="1" />
+
+        <include
+            layout="@layout/cpp_app_button_erase"
+            a:layout_width="0dp"
+            a:layout_height="match_parent"
+            a:layout_weight="1" />
+
+        <FrameLayout
+            a:id="@+id/display"
+            a:layout_width="0dp"
+            a:layout_height="match_parent"
+            a:layout_weight="4"
+            a:orientation="horizontal" />
+
+        <include
+            layout="@layout/cpp_app_button_clear"
+            a:layout_width="0dp"
+            a:layout_height="match_parent"
+            a:layout_weight="1" />
+
+        <include
+            layout="@layout/cpp_app_button_right"
+            a:layout_width="0dp"
+            a:layout_height="match_parent"
+            a:layout_weight="1" />
+
+    </LinearLayout>
+
+    <LinearLayout
+        a:id="@+id/keyboard"
+        a:layout_width="match_parent"
+        a:layout_height="0dp"
+        a:layout_weight="3"
+        a:orientation="horizontal" />
 
 </LinearLayout>
diff --git a/app/src/main/res/layout-land/main_calculator_mobile.xml b/app/src/main/res/layout-land/main_calculator_mobile.xml
deleted file mode 100644
index 9e36701a..00000000
--- a/app/src/main/res/layout-land/main_calculator_mobile.xml
+++ /dev/null
@@ -1,31 +0,0 @@
-<?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
-  -->
-<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
-    a:id="@+id/main"
-    style="@style/CppMain"
-    a:orientation="vertical">
-
-    <include layout="@layout/main_first_pane_mobile" />
-
-</LinearLayout>
diff --git a/app/src/main/res/layout-land/main_first_pane.xml b/app/src/main/res/layout-land/main_first_pane.xml
deleted file mode 100644
index 148b50aa..00000000
--- a/app/src/main/res/layout-land/main_first_pane.xml
+++ /dev/null
@@ -1,86 +0,0 @@
-<?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
-  -->
-<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
-    a:layout_width="match_parent"
-    a:layout_height="match_parent"
-    a:layout_gravity="center"
-    a:orientation="vertical">
-
-    <LinearLayout
-        a:id="@+id/editor"
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="2"
-        a:orientation="horizontal" />
-
-    <LinearLayout
-        a:id="@+id/partial_keyboard"
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1"
-        a:baselineAligned="false"
-        a:orientation="horizontal">
-
-        <include
-            layout="@layout/cpp_app_button_left"
-            a:layout_width="0dp"
-            a:layout_height="match_parent"
-            a:layout_weight="1" />
-
-        <include
-            layout="@layout/cpp_app_button_erase"
-            a:layout_width="0dp"
-            a:layout_height="match_parent"
-            a:layout_weight="1" />
-
-        <FrameLayout
-            a:id="@+id/display"
-            a:layout_width="0dp"
-            a:layout_height="match_parent"
-            a:layout_weight="4"
-            a:orientation="horizontal" />
-
-        <include
-            layout="@layout/cpp_app_button_clear"
-            a:layout_width="0dp"
-            a:layout_height="match_parent"
-            a:layout_weight="1" />
-
-        <include
-            layout="@layout/cpp_app_button_right"
-            a:layout_width="0dp"
-            a:layout_height="match_parent"
-            a:layout_weight="1" />
-
-    </LinearLayout>
-
-    <LinearLayout
-        a:id="@+id/keyboard"
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="3"
-        a:orientation="horizontal" />
-
-
-</LinearLayout>
diff --git a/app/src/main/res/layout-land/main_first_pane_mobile.xml b/app/src/main/res/layout-land/main_first_pane_mobile.xml
deleted file mode 100644
index bd247d9e..00000000
--- a/app/src/main/res/layout-land/main_first_pane_mobile.xml
+++ /dev/null
@@ -1,84 +0,0 @@
-<?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
-  -->
-<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
-    a:layout_width="match_parent"
-    a:layout_height="match_parent"
-    a:layout_gravity="center"
-    a:orientation="vertical">
-
-    <LinearLayout
-        a:id="@+id/editor"
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="2"
-        a:orientation="horizontal" />
-
-    <LinearLayout
-        a:id="@+id/partial_keyboard"
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1"
-        a:baselineAligned="false">
-
-        <include
-            layout="@layout/cpp_app_button_left"
-            a:layout_width="0dp"
-            a:layout_height="match_parent"
-            a:layout_weight="1" />
-
-        <include
-            layout="@layout/cpp_app_button_erase"
-            a:layout_width="0dp"
-            a:layout_height="match_parent"
-            a:layout_weight="1" />
-
-        <FrameLayout
-            a:id="@+id/display"
-            a:layout_width="0dp"
-            a:layout_height="match_parent"
-            a:layout_weight="4" />
-
-        <include
-            layout="@layout/cpp_app_button_clear"
-            a:layout_width="0dp"
-            a:layout_height="match_parent"
-            a:layout_weight="1" />
-
-        <include
-            layout="@layout/cpp_app_button_right"
-            a:layout_width="0dp"
-            a:layout_height="match_parent"
-            a:layout_weight="1" />
-
-    </LinearLayout>
-
-    <LinearLayout
-        a:id="@+id/keyboard"
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="3"
-        a:orientation="horizontal" />
-
-
-</LinearLayout>
diff --git a/app/src/main/res/layout-large-land/cpp_app_keyboard.xml b/app/src/main/res/layout-large-land/cpp_app_keyboard.xml
deleted file mode 100644
index b3f36f4f..00000000
--- a/app/src/main/res/layout-large-land/cpp_app_keyboard.xml
+++ /dev/null
@@ -1,112 +0,0 @@
-<?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
-  -->
-
-<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
-    a:layout_width="match_parent"
-    a:layout_height="match_parent"
-    a:orientation="vertical">
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1">
-
-        <include layout="@layout/cpp_app_button_left" />
-
-        <include layout="@layout/cpp_app_button_erase" />
-
-        <include layout="@layout/cpp_app_button_donate" />
-
-        <include layout="@layout/cpp_app_button_7" />
-
-        <include layout="@layout/cpp_app_button_8" />
-
-        <include layout="@layout/cpp_app_button_9" />
-
-        <include layout="@layout/cpp_app_button_multiplication" />
-
-        <include layout="@layout/cpp_app_button_division" />
-
-        <include layout="@layout/cpp_app_button_clear" />
-
-        <include layout="@layout/cpp_app_button_right" />
-
-    </LinearLayout>
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1">
-
-        <include layout="@layout/cpp_app_button_vars" />
-
-        <include layout="@layout/cpp_app_button_functions" />
-
-        <include layout="@layout/cpp_app_button_empty" />
-
-        <include layout="@layout/cpp_app_button_4" />
-
-        <include layout="@layout/cpp_app_button_5" />
-
-        <include layout="@layout/cpp_app_button_6" />
-
-        <include layout="@layout/cpp_app_button_plus" />
-
-        <include layout="@layout/cpp_app_button_minus" />
-
-        <include layout="@layout/cpp_app_button_copy" />
-
-        <include layout="@layout/cpp_app_button_equals" />
-
-    </LinearLayout>
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1">
-
-        <include layout="@layout/cpp_app_button_empty" />
-
-        <include layout="@layout/cpp_app_button_operators" />
-
-        <include layout="@layout/cpp_app_button_dot" />
-
-        <include layout="@layout/cpp_app_button_1" />
-
-        <include layout="@layout/cpp_app_button_2" />
-
-        <include layout="@layout/cpp_app_button_3" />
-
-        <include layout="@layout/cpp_app_button_0" />
-
-        <include layout="@layout/cpp_app_button_round_brackets" />
-
-        <include layout="@layout/cpp_app_button_paste" />
-
-        <include layout="@layout/cpp_app_button_history" />
-
-    </LinearLayout>
-
-
-</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout-large-land/main_calculator.xml b/app/src/main/res/layout-large-land/main_calculator.xml
deleted file mode 100644
index ca348da8..00000000
--- a/app/src/main/res/layout-large-land/main_calculator.xml
+++ /dev/null
@@ -1,78 +0,0 @@
-<?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
-  -->
-<LinearLayout
-    xmlns:a="http://schemas.android.com/apk/res/android"
-    a:id="@+id/main"
-    style="@style/CppMain.Multipane"
-    a:orientation="vertical">
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_marginTop="@dimen/cpp_pane_margin"
-        a:layout_weight="3"
-        a:baselineAligned="false"
-        a:orientation="horizontal">
-
-        <LinearLayout
-            a:layout_width="0dp"
-            a:layout_height="match_parent"
-            a:layout_gravity="center"
-            a:layout_weight="1"
-            a:orientation="vertical">
-
-            <LinearLayout
-                a:id="@+id/editor"
-                style="@style/CppPane.Multipane.Left"
-                a:layout_width="match_parent"
-                a:layout_height="0dp"
-                a:layout_weight="1" />
-
-            <FrameLayout
-                a:id="@+id/display"
-                style="@style/CppPane.Multipane.Left"
-                a:layout_width="match_parent"
-                a:layout_height="0dp"
-                a:layout_weight="1" />
-
-        </LinearLayout>
-
-        <LinearLayout
-            a:id="@+id/main_second_pane"
-            style="@style/CppPane.Multipane.Right"
-            a:layout_width="0dp"
-            a:layout_height="match_parent"
-            a:layout_weight="1"
-            a:orientation="vertical" />
-
-    </LinearLayout>
-
-    <LinearLayout
-        a:id="@+id/keyboard"
-        style="@style/CppPane.Transparent.Bottom"
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="2" />
-
-</LinearLayout>
diff --git a/app/src/main/res/layout-large/cpp_app_display.xml b/app/src/main/res/layout-large/cpp_app_display.xml
deleted file mode 100644
index 40aedda7..00000000
--- a/app/src/main/res/layout-large/cpp_app_display.xml
+++ /dev/null
@@ -1,41 +0,0 @@
-<?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
-  -->
-
-<LinearLayout a:id="@+id/main_fragment_layout"
-    style="@style/CppFragment"
-    xmlns:a="http://schemas.android.com/apk/res/android"
-    a:layout_width="match_parent"
-    a:layout_height="match_parent">
-
-    <TextView
-        a:id="@+id/fragment_title"
-        style="@style/CppFragmentTitle"
-        a:layout_width="match_parent"
-        a:layout_height="wrap_content" />
-
-    <org.solovyev.android.calculator.DisplayView
-        a:id="@+id/calculator_display"
-        style="@style/CppText.Display" />
-
-</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout-large/cpp_app_editor.xml b/app/src/main/res/layout-large/cpp_app_editor.xml
deleted file mode 100644
index 9716b95e..00000000
--- a/app/src/main/res/layout-large/cpp_app_editor.xml
+++ /dev/null
@@ -1,45 +0,0 @@
-<?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
-  -->
-
-<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
-    a:id="@+id/main_fragment_layout"
-    style="@style/CppFragment"
-    a:layout_width="match_parent"
-    a:layout_height="match_parent">
-
-    <TextView
-        a:id="@+id/fragment_title"
-        style="@style/CppFragmentTitle"
-        a:layout_width="match_parent"
-        a:layout_height="wrap_content" />
-
-    <org.solovyev.android.calculator.EditorView
-        a:id="@+id/calculator_editor"
-        style="@style/CppText.Editor"
-        a:hint="@string/c_calc_editor_hint"
-        a:scrollbars="vertical"
-        a:singleLine="false"
-        a:textIsSelectable="true" />
-
-</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout-large/cpp_app_keyboard.xml b/app/src/main/res/layout-large/cpp_app_keyboard.xml
deleted file mode 100644
index b09bc6ba..00000000
--- a/app/src/main/res/layout-large/cpp_app_keyboard.xml
+++ /dev/null
@@ -1,114 +0,0 @@
-<?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
-  -->
-
-<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
-    a:layout_width="match_parent"
-    a:layout_height="match_parent"
-    a:orientation="vertical">
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1">
-
-        <include layout="@layout/cpp_app_button_left" />
-
-        <include layout="@layout/cpp_app_button_erase" />
-
-        <include layout="@layout/cpp_app_button_7" />
-
-        <include layout="@layout/cpp_app_button_8" />
-
-        <include layout="@layout/cpp_app_button_9" />
-
-        <include layout="@layout/cpp_app_button_multiplication" />
-
-        <include layout="@layout/cpp_app_button_right" />
-
-    </LinearLayout>
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1">
-
-        <include layout="@layout/cpp_app_button_vars" />
-
-        <include layout="@layout/cpp_app_button_clear" />
-
-        <include layout="@layout/cpp_app_button_4" />
-
-        <include layout="@layout/cpp_app_button_5" />
-
-        <include layout="@layout/cpp_app_button_6" />
-
-        <include layout="@layout/cpp_app_button_division" />
-
-        <include layout="@layout/cpp_app_button_copy" />
-
-    </LinearLayout>
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1">
-
-        <include layout="@layout/cpp_app_button_functions" />
-
-        <include layout="@layout/cpp_app_button_equals" />
-
-        <include layout="@layout/cpp_app_button_1" />
-
-        <include layout="@layout/cpp_app_button_2" />
-
-        <include layout="@layout/cpp_app_button_3" />
-
-        <include layout="@layout/cpp_app_button_plus" />
-
-        <include layout="@layout/cpp_app_button_paste" />
-
-    </LinearLayout>
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1">
-
-        <include layout="@layout/cpp_app_button_operators" />
-
-        <include layout="@layout/cpp_app_button_donate" />
-
-        <include layout="@layout/cpp_app_button_round_brackets" />
-
-        <include layout="@layout/cpp_app_button_0" />
-
-        <include layout="@layout/cpp_app_button_dot" />
-
-        <include layout="@layout/cpp_app_button_minus" />
-
-        <include layout="@layout/cpp_app_button_history" />
-
-    </LinearLayout>
-
-</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout-large/main_calculator.xml b/app/src/main/res/layout-large/main_calculator.xml
deleted file mode 100644
index f269f106..00000000
--- a/app/src/main/res/layout-large/main_calculator.xml
+++ /dev/null
@@ -1,78 +0,0 @@
-<?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
-  -->
-<LinearLayout
-    xmlns:a="http://schemas.android.com/apk/res/android"
-    a:id="@+id/main"
-    style="@style/CppMain.Multipane"
-    a:orientation="vertical">
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_marginTop="@dimen/cpp_pane_margin"
-        a:layout_weight="3"
-        a:baselineAligned="false"
-        a:orientation="horizontal">
-
-        <LinearLayout
-            a:layout_width="0dp"
-            a:layout_height="match_parent"
-            a:layout_gravity="center"
-            a:layout_weight="1"
-            a:orientation="vertical">
-
-            <LinearLayout
-                a:id="@+id/editor"
-                style="@style/CppPane.Multipane.Left"
-                a:layout_width="match_parent"
-                a:layout_height="0dp"
-                a:layout_weight="3" />
-
-            <FrameLayout
-                a:id="@+id/display"
-                style="@style/CppPane.Multipane.Left"
-                a:layout_width="match_parent"
-                a:layout_height="0dp"
-                a:layout_weight="1" />
-
-        </LinearLayout>
-
-        <LinearLayout
-            a:id="@+id/main_second_pane"
-            style="@style/CppPane.Multipane.Right"
-            a:layout_width="0dp"
-            a:layout_height="match_parent"
-            a:layout_weight="1"
-            a:orientation="vertical" />
-
-    </LinearLayout>
-
-    <LinearLayout
-        a:id="@+id/keyboard"
-        style="@style/CppPane.Transparent.Bottom"
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="2" />
-
-</LinearLayout>
diff --git a/app/src/main/res/layout-xlarge-land/cpp_app_keyboard.xml b/app/src/main/res/layout-xlarge-land/cpp_app_keyboard.xml
deleted file mode 100644
index d84cd7a6..00000000
--- a/app/src/main/res/layout-xlarge-land/cpp_app_keyboard.xml
+++ /dev/null
@@ -1,101 +0,0 @@
-<?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
-  -->
-
-<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
-    a:layout_width="match_parent"
-    a:layout_height="match_parent"
-    a:orientation="vertical">
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1">
-
-        <include layout="@layout/cpp_app_button_left" />
-
-        <include layout="@layout/cpp_app_button_vars" />
-
-        <include layout="@layout/cpp_app_button_copy" />
-
-        <include layout="@layout/cpp_app_button_6" />
-
-        <include layout="@layout/cpp_app_button_7" />
-
-        <include layout="@layout/cpp_app_button_8" />
-
-        <include layout="@layout/cpp_app_button_9" />
-
-        <include layout="@layout/cpp_app_button_0" />
-
-        <include layout="@layout/cpp_app_button_multiplication" />
-
-        <include layout="@layout/cpp_app_button_division" />
-
-        <include layout="@layout/cpp_app_button_equals" />
-
-        <include layout="@layout/cpp_app_button_operators" />
-
-        <include layout="@layout/cpp_app_button_donate" />
-
-        <include layout="@layout/cpp_app_button_right" />
-
-    </LinearLayout>
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1">
-
-        <include layout="@layout/cpp_app_button_erase" />
-
-        <include layout="@layout/cpp_app_button_functions" />
-
-        <include layout="@layout/cpp_app_button_paste" />
-
-        <include layout="@layout/cpp_app_button_1" />
-
-        <include layout="@layout/cpp_app_button_2" />
-
-        <include layout="@layout/cpp_app_button_3" />
-
-        <include layout="@layout/cpp_app_button_4" />
-
-        <include layout="@layout/cpp_app_button_5" />
-
-        <include layout="@layout/cpp_app_button_plus" />
-
-        <include layout="@layout/cpp_app_button_minus" />
-
-        <include layout="@layout/cpp_app_button_round_brackets" />
-
-        <include layout="@layout/cpp_app_button_dot" />
-
-        <include layout="@layout/cpp_app_button_history" />
-
-        <include layout="@layout/cpp_app_button_clear" />
-
-    </LinearLayout>
-
-
-</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout-xlarge-land/main_calculator.xml b/app/src/main/res/layout-xlarge-land/main_calculator.xml
deleted file mode 100644
index 87771b90..00000000
--- a/app/src/main/res/layout-xlarge-land/main_calculator.xml
+++ /dev/null
@@ -1,79 +0,0 @@
-<?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
-  -->
-<LinearLayout
-    xmlns:a="http://schemas.android.com/apk/res/android"
-    a:id="@+id/main"
-    style="@style/CppMain.Multipane"
-    a:orientation="vertical">
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_marginTop="@dimen/cpp_pane_margin"
-        a:layout_weight="5"
-        a:baselineAligned="false"
-        a:orientation="horizontal">
-
-        <LinearLayout
-            a:layout_width="0dp"
-            a:layout_height="match_parent"
-            a:layout_gravity="center"
-            a:layout_weight="1"
-            a:orientation="vertical">
-
-            <LinearLayout
-                a:id="@+id/editor"
-                style="@style/CppPane.Multipane.Left"
-                a:layout_width="match_parent"
-                a:layout_height="0dp"
-                a:layout_weight="3"
-                a:orientation="horizontal" />
-
-            <FrameLayout
-                a:id="@+id/display"
-                style="@style/CppPane.Multipane.Left"
-                a:layout_width="match_parent"
-                a:layout_height="0dp"
-                a:layout_weight="1" />
-
-        </LinearLayout>
-
-        <LinearLayout
-            a:id="@+id/main_second_pane"
-            style="@style/CppPane.Multipane.Right"
-            a:layout_width="0dp"
-            a:layout_height="match_parent"
-            a:layout_weight="1"
-            a:orientation="vertical" />
-
-    </LinearLayout>
-
-    <LinearLayout
-        a:id="@+id/keyboard"
-        style="@style/CppPane.Transparent.Bottom"
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1" />
-
-</LinearLayout>
diff --git a/app/src/main/res/layout-xlarge/cpp_app_display.xml b/app/src/main/res/layout-xlarge/cpp_app_display.xml
deleted file mode 100644
index 40aedda7..00000000
--- a/app/src/main/res/layout-xlarge/cpp_app_display.xml
+++ /dev/null
@@ -1,41 +0,0 @@
-<?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
-  -->
-
-<LinearLayout a:id="@+id/main_fragment_layout"
-    style="@style/CppFragment"
-    xmlns:a="http://schemas.android.com/apk/res/android"
-    a:layout_width="match_parent"
-    a:layout_height="match_parent">
-
-    <TextView
-        a:id="@+id/fragment_title"
-        style="@style/CppFragmentTitle"
-        a:layout_width="match_parent"
-        a:layout_height="wrap_content" />
-
-    <org.solovyev.android.calculator.DisplayView
-        a:id="@+id/calculator_display"
-        style="@style/CppText.Display" />
-
-</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout-xlarge/cpp_app_editor.xml b/app/src/main/res/layout-xlarge/cpp_app_editor.xml
deleted file mode 100644
index 9716b95e..00000000
--- a/app/src/main/res/layout-xlarge/cpp_app_editor.xml
+++ /dev/null
@@ -1,45 +0,0 @@
-<?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
-  -->
-
-<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
-    a:id="@+id/main_fragment_layout"
-    style="@style/CppFragment"
-    a:layout_width="match_parent"
-    a:layout_height="match_parent">
-
-    <TextView
-        a:id="@+id/fragment_title"
-        style="@style/CppFragmentTitle"
-        a:layout_width="match_parent"
-        a:layout_height="wrap_content" />
-
-    <org.solovyev.android.calculator.EditorView
-        a:id="@+id/calculator_editor"
-        style="@style/CppText.Editor"
-        a:hint="@string/c_calc_editor_hint"
-        a:scrollbars="vertical"
-        a:singleLine="false"
-        a:textIsSelectable="true" />
-
-</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout-xlarge/cpp_app_keyboard.xml b/app/src/main/res/layout-xlarge/cpp_app_keyboard.xml
deleted file mode 100644
index 886eb429..00000000
--- a/app/src/main/res/layout-xlarge/cpp_app_keyboard.xml
+++ /dev/null
@@ -1,122 +0,0 @@
-<?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
-  -->
-
-<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
-    a:layout_width="match_parent"
-    a:layout_height="match_parent"
-    a:orientation="vertical">
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1">
-
-        <include layout="@layout/cpp_app_button_left" />
-
-        <include layout="@layout/cpp_app_button_erase" />
-
-        <include layout="@layout/cpp_app_button_empty" />
-
-        <include layout="@layout/cpp_app_button_empty" />
-
-        <include layout="@layout/cpp_app_button_empty" />
-
-        <include layout="@layout/cpp_app_button_empty" />
-
-        <include layout="@layout/cpp_app_button_clear" />
-
-        <include layout="@layout/cpp_app_button_right" />
-
-    </LinearLayout>
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1">
-
-        <include layout="@layout/cpp_app_button_vars" />
-
-        <include layout="@layout/cpp_app_button_copy" />
-
-        <include layout="@layout/cpp_app_button_7" />
-
-        <include layout="@layout/cpp_app_button_8" />
-
-        <include layout="@layout/cpp_app_button_9" />
-
-        <include layout="@layout/cpp_app_button_multiplication" />
-
-        <include layout="@layout/cpp_app_button_division" />
-
-        <include layout="@layout/cpp_app_button_equals" />
-
-    </LinearLayout>
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1">
-
-        <include layout="@layout/cpp_app_button_functions" />
-
-        <include layout="@layout/cpp_app_button_paste" />
-
-        <include layout="@layout/cpp_app_button_4" />
-
-        <include layout="@layout/cpp_app_button_5" />
-
-        <include layout="@layout/cpp_app_button_6" />
-
-        <include layout="@layout/cpp_app_button_plus" />
-
-        <include layout="@layout/cpp_app_button_minus" />
-
-        <include layout="@layout/cpp_app_button_round_brackets" />
-
-    </LinearLayout>
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1">
-
-        <include layout="@layout/cpp_app_button_operators" />
-
-        <include layout="@layout/cpp_app_button_donate" />
-
-        <include layout="@layout/cpp_app_button_1" />
-
-        <include layout="@layout/cpp_app_button_2" />
-
-        <include layout="@layout/cpp_app_button_3" />
-
-        <include layout="@layout/cpp_app_button_0" />
-
-        <include layout="@layout/cpp_app_button_dot" />
-
-        <include layout="@layout/cpp_app_button_history" />
-
-    </LinearLayout>
-
-</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout-xlarge/main_calculator.xml b/app/src/main/res/layout-xlarge/main_calculator.xml
deleted file mode 100644
index 8651bc38..00000000
--- a/app/src/main/res/layout-xlarge/main_calculator.xml
+++ /dev/null
@@ -1,78 +0,0 @@
-<?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
-  -->
-<LinearLayout
-    xmlns:a="http://schemas.android.com/apk/res/android"
-    a:id="@+id/main"
-    style="@style/CppMain.Multipane"
-    a:orientation="vertical">
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_marginTop="@dimen/cpp_pane_margin"
-        a:layout_weight="3"
-        a:baselineAligned="false"
-        a:orientation="horizontal">
-
-        <LinearLayout
-            a:layout_width="0dp"
-            a:layout_height="match_parent"
-            a:layout_gravity="center"
-            a:layout_weight="1"
-            a:orientation="vertical">
-
-            <LinearLayout
-                a:id="@+id/editor"
-                style="@style/CppPane.Multipane.Left"
-                a:layout_width="match_parent"
-                a:layout_height="0dp"
-                a:layout_weight="4" />
-
-            <FrameLayout
-                a:id="@+id/display"
-                style="@style/CppPane.Multipane.Left"
-                a:layout_width="match_parent"
-                a:layout_height="0dp"
-                a:layout_weight="1" />
-
-        </LinearLayout>
-
-        <LinearLayout
-            a:id="@+id/main_second_pane"
-            style="@style/CppPane.Multipane.Right"
-            a:layout_width="0dp"
-            a:layout_height="match_parent"
-            a:layout_weight="1"
-            a:orientation="vertical" />
-
-    </LinearLayout>
-
-    <LinearLayout
-        a:id="@+id/keyboard"
-        style="@style/CppPane.Transparent.Bottom"
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1" />
-
-</LinearLayout>
diff --git a/app/src/main/res/layout/cpp_plot_fragment.xml b/app/src/main/res/layout/cpp_plot_fragment.xml
index ed94cacb..db473f00 100644
--- a/app/src/main/res/layout/cpp_plot_fragment.xml
+++ b/app/src/main/res/layout/cpp_plot_fragment.xml
@@ -29,12 +29,6 @@
     a:layout_width="match_parent"
     a:layout_height="match_parent">
 
-    <TextView
-        a:id="@+id/fragment_title"
-        style="@style/CppFragmentTitle"
-        a:layout_width="match_parent"
-        a:layout_height="wrap_content" />
-
     <include layout="@layout/ad" />
 
 
diff --git a/app/src/main/res/layout/cpp_plotter_fragment.xml b/app/src/main/res/layout/cpp_plotter_fragment.xml
index 71a1b513..07ee94fc 100644
--- a/app/src/main/res/layout/cpp_plotter_fragment.xml
+++ b/app/src/main/res/layout/cpp_plotter_fragment.xml
@@ -29,12 +29,6 @@
     a:layout_width="match_parent"
     a:layout_height="match_parent">
 
-    <TextView
-        a:id="@+id/fragment_title"
-        style="@style/CppFragmentTitle"
-        a:layout_width="match_parent"
-        a:layout_height="wrap_content" />
-
     <include layout="@layout/ad" />
 
     <org.solovyev.android.plotter.PlotView
diff --git a/app/src/main/res/layout/fragment_entities.xml b/app/src/main/res/layout/fragment_entities.xml
index 470f566a..b6ec97ef 100644
--- a/app/src/main/res/layout/fragment_entities.xml
+++ b/app/src/main/res/layout/fragment_entities.xml
@@ -29,12 +29,6 @@
     a:layout_width="match_parent"
     a:layout_height="match_parent">
 
-    <TextView
-        a:id="@+id/fragment_title"
-        style="@style/CppFragmentTitle"
-        a:layout_width="match_parent"
-        a:layout_height="wrap_content" />
-
     <include layout="@layout/ad" />
 
     <FrameLayout
diff --git a/app/src/main/res/layout/fragment_history.xml b/app/src/main/res/layout/fragment_history.xml
index 814ec9cf..4f73f1f1 100644
--- a/app/src/main/res/layout/fragment_history.xml
+++ b/app/src/main/res/layout/fragment_history.xml
@@ -29,12 +29,6 @@
     a:layout_width="match_parent"
     a:layout_height="match_parent">
 
-    <TextView
-        a:id="@+id/fragment_title"
-        style="@style/CppFragmentTitle"
-        a:layout_width="match_parent"
-        a:layout_height="wrap_content" />
-
     <include layout="@layout/ad" />
 
     <FrameLayout
diff --git a/app/src/main/res/layout/main_calculator_mobile.xml b/app/src/main/res/layout/main_calculator_mobile.xml
deleted file mode 100644
index 0c0cccf1..00000000
--- a/app/src/main/res/layout/main_calculator_mobile.xml
+++ /dev/null
@@ -1,69 +0,0 @@
-<?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
-  -->
-
-<LinearLayout
-    xmlns:a="http://schemas.android.com/apk/res/android"
-    a:id="@+id/main"
-    style="@style/CppMain"
-    a:layout_width="match_parent"
-    a:layout_height="match_parent"
-    a:orientation="vertical">
-
-    <LinearLayout
-        a:id="@+id/editor"
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="2"
-        a:orientation="horizontal" />
-
-    <LinearLayout
-        a:id="@+id/partial_keyboard"
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1"
-        a:baselineAligned="false">
-
-        <include
-            layout="@layout/cpp_app_button_equals_no_bg"
-            a:layout_width="0dp"
-            a:layout_height="match_parent"
-            a:layout_weight="1" />
-
-        <FrameLayout
-            a:id="@+id/display"
-            a:layout_width="0dp"
-            a:layout_height="match_parent"
-            a:layout_weight="4"
-            a:orientation="horizontal" />
-
-    </LinearLayout>
-
-    <LinearLayout
-        a:id="@+id/keyboard"
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="5"
-        a:orientation="vertical" />
-
-</LinearLayout>