diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 455693d..f741eec 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -21,7 +21,7 @@
     <Button
         android:id="@+id/button2"
         android:layout_width="wrap_content"
-        android:layout_height="52dp"
+        android:layout_height="0dp"
         android:layout_marginEnd="13dp"
         android:layout_marginLeft="8dp"
         android:layout_marginRight="13dp"
@@ -36,7 +36,7 @@
     <Button
         android:id="@+id/button3"
         android:layout_width="wrap_content"
-        android:layout_height="57dp"
+        android:layout_height="0dp"
         android:layout_marginTop="12dp"
         android:onClick="ChangeFragment"
         android:text="MainFragment"
@@ -47,7 +47,7 @@
     <Button
         android:id="@+id/button4"
         android:layout_width="wrap_content"
-        android:layout_height="55dp"
+        android:layout_height="0dp"
         android:onClick="ChangeFragment"
         android:text="SubFragment"
         app:layout_constraintBaseline_toBaselineOf="@+id/button3"
@@ -67,7 +67,9 @@
         android:layout_marginTop="8dp"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="1.0"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/button3" />
+        app:layout_constraintTop_toBottomOf="@+id/button3"
+        app:layout_constraintVertical_bias="0.0" />
 
 </android.support.constraint.ConstraintLayout>
\ No newline at end of file