Here are a few random questions about how the forum is laid out.
On each of the topics pages, there are two columns to the left of the topics. The first column has a legend at the bottom, but there is no legend for the second column. Some of those symbols are obvious, but I'm not sure what each of them means.
Good question! When you create a post (or even a reply), just below the subject line there is a field called "Message Icon" where you can select the icon for the message. It defaults to 2 diamonds (or sideways sheets of paper?), but you can also select exclamation and question marks, etc. It is up to the poster. When you do it for a reply, it shows up beside the post title, I chose a smiley for this reply (see above).
Also, when I see different usernames listed (mostly on the bottom of the homepage) they often appear in different colors. I don't think this is simply because I've clicked on them to view the profile. Is there a reason for the different colors?
Yes there is, however I don't think there is a legend or guide describing what they mean. They are based on the user's rank and position. For instance, super admins (Matt & yours truly) are in red, guests are in black, etc.
PS - I am adding a legend at the bottom right now, it should appear shortly.