THE COMMENT TREE
Use the dropdowns that open from below the notice and the comments to add your responses.
If you want to edit or delete your comment, click the crown to go back to the timeline where you can edit or delete your comments and replies in the Control Panel.
Use the search to find comments containing keywords or by people whose names you know. (currently works on laptops and tablets but not on mobiles ) Vote comments and replies up or down. If the aggregate vote goes below -5 the comment or reply is voted off.
If you need to reboot the screen just click the crown to go to the timeline then click the crown below the notice title to return!