There are two ways to set your notification.
Method 1 - Is through your profile
To access all of your notification settings:
You can also
Method 2 - is at each Action Hub item
At each Action Hub item (forum, manual, post, task, comment, etc.), you will find a blue bar that shows the commands that are available. Most times you will be able to click on a "Subscribe to:" link.
Choose the items that you want to subscribe to. At the same locations you can also choose to un-subscribe.
If you want to follow the CW manuals and any changes to the manuals, subscribe to notifications about the content type "Help Documentation"