well, you got two correct answers.
you asked if there was a way to do your settings to do this.
craig's answer was correct, you can't do it with a standard phpbb board.
Jim has provided you with a MOD that can do it however.
I'm baaaaaccckkkk. still doing work on donation basis. PM your needs.
Premium phpBB 3.3 Styles
If a tree falls in the forest and nobody is there, does it make a sound?