title: Changing font in Sublime Text 3
body: <p>I want to change the font in Sublime Text 3 to Roboto Mono, so I downloaded the file and installed it on my computer (macOS).
  Then I go and open Sublime Text 3, go to "Settings --> Preferences", getting to the split screen where I put into the right side this:</p>
  
  <pre><code>"font_face": "Roboto Mono",
  "font_size": 10, 
  </code></pre>
  
  <p>Now this is supposed to work but it doesn't.</p>
  
  <p>Can someone advise please?</p>
  
  <hr>
  
  <p>Update: 
  The error I'm getting is:</p>
  
  <pre><code>Unable to save ~/Library/Application Support/Sublime Text 3/Packages/User/Preferences.sublime-settings
  Error: No such file or directory
  </code></pre>