Since everyone is talking about Macs today — did you see the iPhone — I thought it would be a good time to pose to my highly intelligent readers a question that has vexed me for months. I have a Dell 24″ monitor attached to a Mac Mini, my preferred configuration for this is vertical (you can turn the Dell on its side) but I can’t find the setting in OS X that lets you put the screen into portrait mode. Any tips? Update: It was right under my nose. System Prefs -> Displays -> Rotate. Thanks to Daniel and Barry.