When you enter BBS, you can see topics.
The number at the bottom of topic means the number of reply.
If you click mark on the top of replied topic, you can see reply.
If you would like to reply, click topic which you would like to reply. Then reply menu is displayed.
You have to write title and name on the two upper blank. You do not have to write mail address and URL on the two lower blank.
When you finish writing reply, confirm submit.
If you would like to post new topic, press upper left button. You can write new topic by same method of replying.