Posting a Topic or Reply:

Click the "Post Reply" button:


or

Click the "New Topic" button:


For a new topic, enter a subject:


Style changes (bold, italic, underline):
Type what you want to say:


Highlight the text you want to style, and click the appropriate button:


Your entry will be surrounded by [ ] like this, and will appear in whatever style you chose:


Post an Image:

Find an image on the web you want to post (picasa album, flickr, another website, etc...) and right click. Click "Copy Image Location"


Paste the link, highlight it, and click "Img" button:


Your image link will look like this:


Preview:

Click the "Preview" button at the bottom of the editor:


The preview of your post will show, and you can make any edits you need before posting:

Just found this handy guide with more advanced forum information in it!

http://www.phpbb.com/community/faq.php?mode=bbcode

The code forums use is called BBcode. It's different from HTML, which more people are familiar with. The above think shows you some tricks with BBcode, such as hyper-linking text.

BBCode (Bulletin Board Code)...I used to run a forum myself and had to deal with quite a bit of confusion from the users, regarding this markup language, which is actually quite simple .

Great idea to setup a post to clarify this matter, kudos!