title: Intellij IDEA--How to modify build.gradle by Project Structure?
body: <p>I need to use a 3rd library. I've tried open <strong>Project Structure</strong> and add libraries to that Module.</p>
  
  <p><a href="https://i.stack.imgur.com/d6Oui.png" rel="nofollow noreferrer">add library</a></p>
  
  <p><a href="https://i.stack.imgur.com/bgV7v.png" rel="nofollow noreferrer">modification revert</a></p>
  
  <p>but when I click green"+" button in Gradle Tool Window, all modification disappear!</p>
  
  <p>I cannot figure the reason, is that a BUG?</p>
  
  <p>if not, how can I change gradle setting by Project Structure?</p>