title: Android Studio Constraints not showing [Android Studio 3.1.3]
body: <p>As shown in the image, the constraints are not visible besides activating them.
  I have no idea how to solve this problem.</p>
  
  <p><img src="https://i.stack.imgur.com/7h8je.png" alt="Screenshot"></p>
  
  <p>Thanks.</p>
  
  <p>[Edit]
  Here is the XML Code, i haven't changed anything just added the Elements on the Design Tab.</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto"
      xmlns:tools="http://schemas.android.com/tools"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      tools:layout_editor_absoluteX="0dp"
      tools:layout_editor_absoluteY="81dp"&gt;
  
  
      &lt;Button
          android:id="@+id/btn_jump"
          android:layout_width="128dp"
          android:layout_height="48dp"
          android:text="Jump Activity"
          app:layout_constraintBottom_toBottomOf="parent"
          app:layout_constraintLeft_toLeftOf="parent"
          app:layout_constraintRight_toRightOf="parent"
          app:layout_constraintTop_toTopOf="parent"
          tools:layout_constraintBottom_creator="1"
          tools:layout_constraintLeft_creator="1"
          tools:layout_constraintRight_creator="1"
          tools:layout_constraintTop_creator="1" /&gt;
  
      &lt;EditText
          android:id="@+id/edt_Name"
          android:layout_width="215dp"
          android:layout_height="43dp"
          android:layout_marginTop="107dp"
          android:ems="10"
          android:inputType="textPersonName"
          android:text=""
          app:layout_constraintHorizontal_bias="0.502"
          app:layout_constraintLeft_toLeftOf="parent"
          app:layout_constraintRight_toRightOf="parent"
          app:layout_constraintTop_toTopOf="parent"
          tools:layout_constraintLeft_creator="1"
          tools:layout_constraintRight_creator="1"
          tools:layout_constraintTop_creator="1" /&gt;
  &lt;/android.support.constraint.ConstraintLayout&gt;
  </code></pre>