Ok - I've had my PowerBook for about 4 years and I've only recently learnt a new feature. I'm fairly savy on the old OSX front, but have only learnt that OSX supports a certain feature. Whilst at Uni - I had a small desk - and attached a CRT screen to my powerbook as a second display. I've left uni and now working - so I have recently got a Dell 2407WFP Rev A04, and a big big new desk. It was annoying me that due to my setup, my viewing both screens strained my neck a bit. So... I only just learnt that I could make my Dell as the main display (with the dock), and make my 15" Al Powerbook's screen, as the extended display. This got me really happy I found out how to do it (it seems stupid now that I didn't know how) - I guess simple things please me. Anyway I don't know why I thought I'd share this, just thought that I would!