For basics on what BB coding does what read the
SMF Bulletin Board Code SectionWhen using the "Reply" button you will get the full posting editor. So you can use the buttons to add formatting and similes
When you select a button you will get the BB coding with your cursor in between were you need to enter the text you want to show with that coding.
When using the Quick Reply (after enabling in your profile) you can manually enter any BB coding you'd like applied to your post.
To include attachments with your post
For more posting help please read ....
http://www.dodgeownerforums.com/smf/index.php?topic=14230.0For Fire Fox users there is also an add-on named "BBCode" that allows a good number of BB codes to be applied from a right-click
my personal favorite!