Sometimes space is at a premium, we understand just how valuable screen real estate can be. If you need to make the most of your monitor you may want to try out Compact Text Mode. It's a little reminiscent of everyone's favorite old IRC chats.
Here's how to find it:
User Settings -> Appearance -> Message Display -> Compact Mode
Just check the box for Compact mode and you are all set!
The biggest difference you'll see is that user avatars no longer show up. What was once:
Now gets shrunk down to:
No more avatars and many more messages! Don't forget that role colors will still be prevalent as well.