jm HÎ+è=s åÖ"ùZ66^¶ÝÑ4Së:iÓÓL¥Not super intuitive. Think maybe you click, drops down existing replies, and in there's a 'new comment' button like the same speech bubble w/ asterisk for new maybe.
https://whatsonchain.com/tx/9c1e746ed44825ae9930a5b1fcddf67f1c3d8383a67b4c61fe05c4ab3975c546