Hello, I've tried to find a thread that addresses this, but could not. I am new to Macs. I have a late '05 PowerBook G4 15" that was given to me at a new job. They bought me a brand new Dell E248WFP 24" external monitor which arrived today. (I too, suffer the same problem that others have when I shut my lid, but that's another story). Anyway, I have my PB G4 set to it's native screen resolution of 1440 x 960, and the screen image covers all the screen. Fine. The Dell's native resolution is 1920 x 1200. When I select that resolution for the Dell external display in System Preferences, the image on the Dell external display reduces in physical size (not resolution) so much that it leaves at least 3" of black unused "screen" on the left and right sides, and 2" on the top and bottom sides, effectively making my new 24" monitor a 17" or 18" monitor. Do you understand? But if I set the Dell to be at a lower resolution, say 1024 x 768 (in pixels), the image's physical size on the screen gets larger, albeit fuzzier with larger fonts & icons, etc. What's the deal? I want the 1920 x 1200 pixels to take up the ENTIRE screen, not a small subset of it. Thank you.