3. In the PROPERTY column, select Tracking Info from the menu
4. Select Tracking Code to get your property's tracking ID and snippet code
5. Edit the snippet code
You'll use the same ID and snippet from that property for all of your domains. But you will need to edit the snippet in order for cross-domain tracking to work. (This is longer text located below your Tracking ID).
Copy and paste the snippet where you'll be able to make the necessary changes.
Then, find the create line in the snippet.
ga('create', 'UA-ZZZZZZ-Y', 'stories.com');
In this example, your site - or primary domain- is the example 'stories.com'.
Make the following changes and additions to the snippet (the changes you need to make are in bold red text):