From the lobby, you can enter each forum or conference (depending on your board's display option) by clicking on the folder icon or the link to the right of the icon. The same applies for topics page.
Once you are in the topic, meaning the page with the actual messages,
you can see Previous Topic | Next Topic links located above the first message to the right.
Those links will allow you to view the previous and the next topics relative to your current topic as listed in the topics page.
Below the last message in your current topic, you can see the following links -
Conferences | Forums | Topics | Previous Topic | Next Topic. Clicking on the Conferences link will bring you back to the page listing all conferences. Forums will bring you out to the page listing all forums.
Topics will bring you out to the topic listing. Previous Topic | Next Topic are identical to the links above.
You can also navigate back by clicking on the links Conferences->Forums-> Topics located in the row below the feature icons(2nd table row from the top).

1. What is a conference?
2. What is a forum?
3. What is a thread/topic?
4. Why are there so many different types of forums?
5. How do I get access to restricted and private forums?
6. When I post a message in one forum, it posts ok. But in another forum, it won't post. Why?

1. Do I have to register?
2. Why should I register?
3. How do I register?
4. The registration process tells me that I have an invalid email address. What's up with that?

1. What does each menu icon allow me to do?
2. Why do some file icons display flame?
3. Why do some forum folder icons display a lock?
4. Why do some topic icons display a lock?
5. Why do some topics have [view all] next to the subject?
6. What are all those icons immediately to the right of the username?
7. What are all those icons to the upper right corner of each message below the date and time?

1. How do I navigate?
2. How do I start a new topic?
3. How do I start a new poll?
4. How do I reply to an existing message?
5. How do I keep track of new messages?
6. How do I change my account information?
7. How do I change my password?
8. How do I edit my profile?
9. How do I edit my forum preference?
10. How do I subscribe to forums?
11. How do I manage subscription to topics?
12. How do I hide my profile or disable email functions?
13. How do I use an avatar image in my messages?
14. How do I use signatures in my messages?
15. How do I use HTML tags in my messages?
16. How do I post images?
17. How do I use HTML links?

1. What is a subscription?
2. What is an inbox?
3. What is a bookmark?
4. What is a buddy list?
5. What is a scratch pad?
6. What is topic rating system?
7. How do I rate topics?
8. What is user rating system?
9. How do I participate? Do I have to participate?
10. How do I rate other users?