Besides being prompted, how do I declare a new document thread?
When you start with a tracked file and use Save As or edit a copied file for the first time, you are prompted to decide whether the new file is in the same document thread or the start of a new document thread. This is the most convenient and reliable method of tracking documents if you are just starting to use the application. If you turn the prompt off, a subsequent file will always be a copy or version in the same document thread unless you use File > Save As and Track as Different Document to ensure that the new file is tracked as the first copy of a new document thread. You must use this command consistently in order to track your files correctly. To turn the prompt on or off, go to the Tracking tab of the Preferences dialog. Selecting the top radio button “Prompt about how to track new file” turns the prompt on. Selecting the bottom radio button “Track new file as a copy or new version” turns the prompt off.
