When we reply to a thread, there is a "Rate thread" pull-down menu. What does it mean? And if we select a rating, what effect does it have? Also, does the rating apply only to post 1? Or does (can) it apply to a specific non-OP reply post within the thread? Or, instead, does it apply to all previous replies plus post 1? Also, is there any way to see which threads have a high rating, and which threads have a low rating, or something like that? Just wondering what this menu means, and its effect. I did a quick search, but did not find instructions about this menu yet.