These are the steps I used:
1. Ctrl-Shift-p to open the Command palette
2. Search for Settings and click Preferences: Open User Settings
3. In the left hand pane, click on the setting you want to change
4. Click on the pencil icon to the left of the setting. It will either give you the valid options from which to choose or it will let you copy the option to user settings.
- The setting will appear in the right-hand pane.
- Edit the setting as necessary on the right and Save