You can now set tracked topics
by clicking the link 'track' in the topic menu bar. This will remember the actual topic, and create a list for you in your personal profile, or by clicking 'my tracked topics'.
What's the use?
You can put topics in this list which you want to keep track of, even if you are not active in it, so you can track it for any changes so you can get back to it in the future.
How to remove them again?
If you don't want to track a topic anymore, simply click on the 'X' link on the tracked topics page. The topic will be removed from your active topics again. In this way, you can clean your list.
How much topics can I add?
There is no other upper limit to the number of tracked topics than the number of topics on the forum. I won't remove them from your list, even if they are closed.