I wasn't a participant, but ... it definitely hurts that, like, I haven't the faintest friggin clue how HN's whole voting system works - in fact I'm not even su

I wasn't a participant, but ... it definitely hurts that, like, I haven't the faintest friggin clue how HN's whole voting system works - in fact I'm not even sure where the downvote button is. There's a minus [-] next to them, but that seems to toggle viewing the subthread on and off. "Surely that's not the downvote button." I just assume I don't have access until I have some sort of hidden karma value that's high enough. A few tooltips would work wonders, and I believe can still be done with the nice, cleanly-simple html style they've gone for.