The options menu allows you to change the settings on your account, and optionally activate various privacy settings. You should also always use the options menu to logout after playing. The 1st option allows you to toggle the camera between 'auto' and 'manual' mode. In auto mode the camera will attempt to automatically rotate such that your character is always visible. The next 3 options are privacy settings. They are applied to all people who are not on your friends list. You can use these to block chat and/or trade messages from all people who you haven't listed as friends.