title: How to remove this green area when using vim?
body: <p><a href="https://i.stack.imgur.com/ugdPo.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ugdPo.png" alt="enter image description here"></a></p>
  
  <p>I was using WSL(window subsystem for linux) Ubuntu, and i was editing a code with vim.</p>
  
  <p>Every time I look down and look up again, these green area has generated.</p>
  
  <p>There is no effect of green area, but it really bothers me.</p>
  
  <p>How can I remove this? Do I modify the vimrc?</p>