Hi
As you enter each forum, you will see a "Forum Tools" button top right below the page numbers. Clicking that will bring a drop down menu where you will see the option to subscribe to that forum.
Similarly, if you want to subscribe to a particular thread, you will see the button for "Thread Tools" top right under the page numbers once you enter the thread
Your subscriptions will appear in your user CP (top left) and you can also set your options to receive email notifications
hope that helps
welcome to NeuroTalk
Cheri