diff --git a/app/src/main/java/org/solovyev/android/calculator/plot/PlotDimensionsFragment.java b/app/src/main/java/org/solovyev/android/calculator/plot/PlotDimensionsFragment.java
index 6cff7f49..eff09e42 100644
--- a/app/src/main/java/org/solovyev/android/calculator/plot/PlotDimensionsFragment.java
+++ b/app/src/main/java/org/solovyev/android/calculator/plot/PlotDimensionsFragment.java
@@ -12,7 +12,6 @@ import android.support.v7.app.AlertDialog;
 import android.text.Editable;
 import android.text.TextUtils;
 import android.text.TextWatcher;
-import android.util.Log;
 import android.view.KeyEvent;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -20,19 +19,13 @@ import android.view.inputmethod.EditorInfo;
 import android.view.inputmethod.InputMethodManager;
 import android.widget.EditText;
 import android.widget.TextView;
-
-import org.solovyev.android.calculator.App;
-import org.solovyev.android.calculator.AppComponent;
-import org.solovyev.android.calculator.BaseDialogFragment;
-import org.solovyev.android.calculator.BaseFragment;
-import org.solovyev.android.calculator.R;
+import butterknife.Bind;
+import butterknife.ButterKnife;
+import org.solovyev.android.calculator.*;
 import org.solovyev.android.plotter.Check;
 import org.solovyev.android.plotter.Plot;
 import org.solovyev.android.plotter.Plotter;
 
-import butterknife.Bind;
-import butterknife.ButterKnife;
-
 import javax.annotation.Nonnull;
 import javax.inject.Inject;
 
@@ -152,7 +145,7 @@ public class PlotDimensionsFragment extends BaseDialogFragment
     @Override
     protected void onPrepareDialog(@NonNull AlertDialog.Builder builder) {
         builder.setTitle("Dimensions");
-        builder.setPositiveButton(android.R.string.ok, null);
+        builder.setPositiveButton(R.string.cpp_done, null);
     }
 
     @NonNull
@@ -243,12 +236,12 @@ public class PlotDimensionsFragment extends BaseDialogFragment
         final boolean nanRight = Float.isNaN(r);
         if (nanLeft || nanRight) {
             if (nanLeft) {
-                setError(lInput, " ");
+                setError(lInput, R.string.cpp_nan);
             } else {
                 clearError(lInput);
             }
             if (nanRight) {
-                setError(rInput, " ");
+                setError(rInput, R.string.cpp_nan);
             } else {
                 clearError(rInput);
             }
@@ -259,8 +252,7 @@ public class PlotDimensionsFragment extends BaseDialogFragment
 
     @NonNull
     private RectF collectData() {
-        return new RectF(getDimension(xMin), getDimension(yMin), getDimension(xMax),
-            getDimension(yMax));
+        return new RectF(getDimension(xMin), getDimension(yMin), getDimension(xMax), getDimension(yMax));
     }
 
     private void applyData() {
@@ -272,7 +264,6 @@ public class PlotDimensionsFragment extends BaseDialogFragment
         try {
             return Float.parseFloat(view.getText().toString().replace(",", ".").replace("−", "-"));
         } catch (NumberFormatException e) {
-            Log.w(Plot.getTag("MainActivity"), e.getMessage(), e);
             return Float.NaN;
         }
     }
diff --git a/app/src/main/res/drawable-hdpi/ic_3d_rotation_white_24dp.png b/app/src/main/res/drawable-hdpi/ic_3d_rotation_white_24dp.png
new file mode 100644
index 00000000..510504e6
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/ic_3d_rotation_white_24dp.png differ
diff --git a/app/src/main/res/drawable-hdpi/ic_my_location_white_24dp.png b/app/src/main/res/drawable-hdpi/ic_my_location_white_24dp.png
new file mode 100644
index 00000000..745db489
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/ic_my_location_white_24dp.png differ
diff --git a/app/src/main/res/drawable-hdpi/ic_zoom_in_white_24dp.png b/app/src/main/res/drawable-hdpi/ic_zoom_in_white_24dp.png
new file mode 100644
index 00000000..63732940
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/ic_zoom_in_white_24dp.png differ
diff --git a/app/src/main/res/drawable-hdpi/ic_zoom_out_white_24dp.png b/app/src/main/res/drawable-hdpi/ic_zoom_out_white_24dp.png
new file mode 100644
index 00000000..7772ceea
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/ic_zoom_out_white_24dp.png differ
diff --git a/app/src/main/res/drawable-mdpi/ic_3d_rotation_white_24dp.png b/app/src/main/res/drawable-mdpi/ic_3d_rotation_white_24dp.png
new file mode 100644
index 00000000..874a274f
Binary files /dev/null and b/app/src/main/res/drawable-mdpi/ic_3d_rotation_white_24dp.png differ
diff --git a/app/src/main/res/drawable-mdpi/ic_my_location_white_24dp.png b/app/src/main/res/drawable-mdpi/ic_my_location_white_24dp.png
new file mode 100644
index 00000000..d1c563cc
Binary files /dev/null and b/app/src/main/res/drawable-mdpi/ic_my_location_white_24dp.png differ
diff --git a/app/src/main/res/drawable-mdpi/ic_zoom_in_white_24dp.png b/app/src/main/res/drawable-mdpi/ic_zoom_in_white_24dp.png
new file mode 100644
index 00000000..36a659dd
Binary files /dev/null and b/app/src/main/res/drawable-mdpi/ic_zoom_in_white_24dp.png differ
diff --git a/app/src/main/res/drawable-mdpi/ic_zoom_out_white_24dp.png b/app/src/main/res/drawable-mdpi/ic_zoom_out_white_24dp.png
new file mode 100644
index 00000000..e69da0ba
Binary files /dev/null and b/app/src/main/res/drawable-mdpi/ic_zoom_out_white_24dp.png differ
diff --git a/app/src/main/res/drawable-xhdpi/ic_3d_rotation_white_24dp.png b/app/src/main/res/drawable-xhdpi/ic_3d_rotation_white_24dp.png
new file mode 100644
index 00000000..8d4120e8
Binary files /dev/null and b/app/src/main/res/drawable-xhdpi/ic_3d_rotation_white_24dp.png differ
diff --git a/app/src/main/res/drawable-xhdpi/ic_my_location_white_24dp.png b/app/src/main/res/drawable-xhdpi/ic_my_location_white_24dp.png
new file mode 100644
index 00000000..ffab865d
Binary files /dev/null and b/app/src/main/res/drawable-xhdpi/ic_my_location_white_24dp.png differ
diff --git a/app/src/main/res/drawable-xhdpi/ic_zoom_in_white_24dp.png b/app/src/main/res/drawable-xhdpi/ic_zoom_in_white_24dp.png
new file mode 100644
index 00000000..ce88ebdd
Binary files /dev/null and b/app/src/main/res/drawable-xhdpi/ic_zoom_in_white_24dp.png differ
diff --git a/app/src/main/res/drawable-xhdpi/ic_zoom_out_white_24dp.png b/app/src/main/res/drawable-xhdpi/ic_zoom_out_white_24dp.png
new file mode 100644
index 00000000..8c6ccea7
Binary files /dev/null and b/app/src/main/res/drawable-xhdpi/ic_zoom_out_white_24dp.png differ
diff --git a/app/src/main/res/drawable-xxhdpi/ic_3d_rotation_white_24dp.png b/app/src/main/res/drawable-xxhdpi/ic_3d_rotation_white_24dp.png
new file mode 100644
index 00000000..974abd11
Binary files /dev/null and b/app/src/main/res/drawable-xxhdpi/ic_3d_rotation_white_24dp.png differ
diff --git a/app/src/main/res/drawable-xxhdpi/ic_my_location_white_24dp.png b/app/src/main/res/drawable-xxhdpi/ic_my_location_white_24dp.png
new file mode 100644
index 00000000..387ecdfb
Binary files /dev/null and b/app/src/main/res/drawable-xxhdpi/ic_my_location_white_24dp.png differ
diff --git a/app/src/main/res/drawable-xxhdpi/ic_zoom_in_white_24dp.png b/app/src/main/res/drawable-xxhdpi/ic_zoom_in_white_24dp.png
new file mode 100644
index 00000000..30b84706
Binary files /dev/null and b/app/src/main/res/drawable-xxhdpi/ic_zoom_in_white_24dp.png differ
diff --git a/app/src/main/res/drawable-xxhdpi/ic_zoom_out_white_24dp.png b/app/src/main/res/drawable-xxhdpi/ic_zoom_out_white_24dp.png
new file mode 100644
index 00000000..68aaec6d
Binary files /dev/null and b/app/src/main/res/drawable-xxhdpi/ic_zoom_out_white_24dp.png differ
diff --git a/app/src/main/res/drawable-xxxhdpi/ic_3d_rotation_white_24dp.png b/app/src/main/res/drawable-xxxhdpi/ic_3d_rotation_white_24dp.png
new file mode 100644
index 00000000..3137f7ec
Binary files /dev/null and b/app/src/main/res/drawable-xxxhdpi/ic_3d_rotation_white_24dp.png differ
diff --git a/app/src/main/res/drawable-xxxhdpi/ic_my_location_white_24dp.png b/app/src/main/res/drawable-xxxhdpi/ic_my_location_white_24dp.png
new file mode 100644
index 00000000..c55220a5
Binary files /dev/null and b/app/src/main/res/drawable-xxxhdpi/ic_my_location_white_24dp.png differ
diff --git a/app/src/main/res/drawable-xxxhdpi/ic_zoom_in_white_24dp.png b/app/src/main/res/drawable-xxxhdpi/ic_zoom_in_white_24dp.png
new file mode 100644
index 00000000..b636f6e3
Binary files /dev/null and b/app/src/main/res/drawable-xxxhdpi/ic_zoom_in_white_24dp.png differ
diff --git a/app/src/main/res/drawable-xxxhdpi/ic_zoom_out_white_24dp.png b/app/src/main/res/drawable-xxxhdpi/ic_zoom_out_white_24dp.png
new file mode 100644
index 00000000..d85e242b
Binary files /dev/null and b/app/src/main/res/drawable-xxxhdpi/ic_zoom_out_white_24dp.png differ
diff --git a/app/src/main/res/layout/fragment_plot.xml b/app/src/main/res/layout/fragment_plot.xml
index 5f021cb9..75200082 100644
--- a/app/src/main/res/layout/fragment_plot.xml
+++ b/app/src/main/res/layout/fragment_plot.xml
@@ -16,11 +16,11 @@
         a:layout_gravity="top|start"
         a:src="@drawable/ic_straighten_white_24dp" />
 
-    <org.solovyev.android.material.MaterialButton
+    <org.solovyev.android.material.MaterialImageButton
         a:id="@id/plot_3d_button"
         style="@style/CppPlotButton"
         a:layout_gravity="top|end"
-        a:text="@string/cpp_plot_3d" />
+        a:src="@drawable/ic_3d_rotation_white_24dp" />
 
     <LinearLayout
         a:layout_width="wrap_content"
@@ -28,10 +28,10 @@
         a:layout_gravity="bottom|start"
         a:orientation="vertical">
 
-        <org.solovyev.android.material.MaterialButton
+        <org.solovyev.android.material.MaterialImageButton
             a:id="@+id/plot_add_function"
             style="@style/CppPlotButton"
-            a:text="@string/cpp_plot_add_function" />
+            a:src="@drawable/ic_add_white_24dp" />
 
         <org.solovyev.android.material.MaterialImageButton
             a:id="@+id/plot_functions"
@@ -45,20 +45,20 @@
         a:layout_gravity="bottom|end"
         a:orientation="vertical">
 
-        <org.solovyev.android.material.MaterialButton
+        <org.solovyev.android.material.MaterialImageButton
             a:id="@id/plot_zoom_in_button"
             style="@style/CppPlotButton"
-            a:text="@string/cpp_plot_zoom_in" />
+            a:src="@drawable/ic_zoom_in_white_24dp" />
 
-        <org.solovyev.android.material.MaterialButton
+        <org.solovyev.android.material.MaterialImageButton
             a:id="@id/plot_zoom_reset_button"
             style="@style/CppPlotButton"
-            a:text="@string/cpp_plot_zoom_reset" />
+            a:src="@drawable/ic_my_location_white_24dp" />
 
-        <org.solovyev.android.material.MaterialButton
+        <org.solovyev.android.material.MaterialImageButton
             a:id="@id/plot_zoom_out_button"
             style="@style/CppPlotButton"
-            a:text="@string/cpp_plot_zoom_out" />
+            a:src="@drawable/ic_zoom_out_white_24dp" />
     </LinearLayout>
 
 </org.solovyev.android.plotter.PlotViewFrame>
\ No newline at end of file