title: How to convert vertical guideline into Percentage
body: <p>This looks easy,After adding Vertical Guideline, When you click on the upper arrow it turns into percentage, but there is something wrong in my android studio, or in the constraint layout version i am using or may be i am doing something terribly wrong  here.</p>
  
  <p><a href="https://i.stack.imgur.com/p6tZ2.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/p6tZ2.png" alt="enter image description here"></a></p>
  
  <p>I have tried everything, but it always shows the same arrorw, and never turns itself to percentage, when  i click on it.</p>
  
  <p>I am using <code>Android Studio 2.2</code>, and added this in my gradle. </p>
  
  <p><code>compile 'com.android.support.constraint:constraint-layout:1.0.0-beta4'</code> </p>
  
  <p>Kindly guide me how to convert this into percentage.</p>