title: Why is there a right margin line in Android Studio editor window?
body: <p>There is a vertical line in the middle of the file editor window in Android Studio. I'm unable to change the margin line. Below is the screenshot of the right margin line:</p>
  
  <p><a href="https://i.stack.imgur.com/xQI1R.png" rel="noreferrer"><img src="https://i.stack.imgur.com/xQI1R.png" alt="enter image description here"></a></p>
  
  <p>Where is the setting to change this line?</p>