I tried asking this about a month ago and got no response, so thought I'd give it another try. Background: HP DesignJet 800 42 Using latest driver from HP OS: Win XP Pro 42 Roll Why is it that using an Arch E1-30x42 (landscape) sheet size (modified so that the margins are: Top - .50 Bottom - .25 Left - 1.0 Right - .25 The plot will display perfectly, but print centered (even though the center plot is NOT checked). However, if I check the 'plot upside down' and replot, the same plot comes out almost perfectly. I say almost because the margins are good, but for some reason it prints the sheet at 30.5" and not a true 30". Why does it seem as though understanding Quantum Physics is easier than grasping how AutoCAD plots? Any help would be greatly appreciated as I have no hair left to pull out over this. Thanks.