You don't have the ability to downvote. It's a down arrow right below the upvote (up arrow). [-] collapses the parent, you're correct. You can also unvote if

You don't have the ability to downvote. It's a down arrow right below the upvote (up arrow). [-] collapses the parent, you're correct. You can also unvote if you change your mind on your vote.