When you are viewing discussions or threads, there is the standard bookmark icon at the top right hand side of the discussion.
When you click on that, you now have a book mark for that discussion. After a while you can then have a list of the various discussions you have book marked.
Book marking is essentialy setting up a list of threads that you want to follow or subscribe to.
To view all your bookmarks, just click on My bookmarks from your profile/avatar. That will display a list of all the discussions you are following. Then from there you can click on any one to view them.
This creates a simple way for you to follow discussions that have great interest to you.
Ron DiLauro Spine-Health System Administrator I am not a medical professional. I comment on personal experiences