As with the rest of Perch you can supply your own HTML and CSS via your pages, the template system and your own stylesheets so your forum could look completely different to this, This should give you an idea of the forum workflow (in this case with Moderation enabled)
Click on a topic title to view posts or 'Add a New Topic' to go to the Add Topic screen.
Clicking on OK takes you to the Add Post Screen
Clicking OK creates the post and the goes to the Post List screen for the created topic
Here, moderation is enabled and the post is hidden. The original author can still edit it though. Clicking on New Post goes to the Add Post screen. If it has been enabled, an email is sent to the moderator to say that a post is waiting moderation
List of Posts Waiting Moderation
The moderator will come to this screen to see which posts need to be examined. Clicking on the name for each post will show the post edit screen
If the post is acceptable the Moderator will set the status to Accepted, they can also set it to 'Rejected' where the user can go and edit the post or 'Deleted' where the post is hidden. If the post is really, really bad the IP of the user when posting is shown on this screen too.
Once the post is accepted (or auto-accepted when Moderation is disabled) the post appears in the post list.