Agreed, there is no button. But that functionality is in the highlighted links below.For threads that are more than a few posts long, the "go to first unread" icon next to the thread title is pretty handy. I dont see a similar function here?
Are there moderator, staff now, functions I should be trying to break? I'm pretty.clumsy with them on Actual Barf to be honest
BTW, that little screen snippet was added by simply using the "snipping tool" in Windows, and simply pasting it in the post editor!