```coffeescript
"*":
  "exception-reporting":
    userId: "53c5f869-8a29-d7f5-ef48-bc598612bb8d"
  welcome:
    showOnStartup: false
  core: {}
  editor:
    invisibles: {}
```

Use preview tab like sublime
user
```coffeescript
"*":
  "exception-reporting":
    userId: "53c5f869-8a29-d7f5-ef48-bc598612bb8d"
  welcome:
    showOnStartup: false
  editor:
    invisibles: {}
  tabs:
    usePreviewTabs: true
```
assistant