i dont know how to do this!!

[Michael Jackson]

closed; got help.

[Sly Fly]

Click settings at the top of the screen.

[MunnyTrooper]

Click settings at the top of the screen, as Sly Fly said.
Scroll all the way down and it should be right there.
If it's hard seeing it, try minimizing the "Subscribed topics" box ( Clicking the button on the top right ).