Unwatch a thread??

I can't seem to find any checkboxes though? I've gone to both Recent Unread Topics and Updated Topics, but neither of them has checkboxes. I looked at the mod images and I've got the icon to take you to the last post and "Mark all messages as read" but none of the other options relating to checkboxes.

I also went to Ignore Topics Option and I can't add any topics to ignore from there. :^)