Dear Roland Kaiser, I think there may different pixel-to-point scaling in different devices. This scaling seems not only to vary with the device but even with your physical screen. This is what happens with my current box (MacBook):
> quartz() > par("mar")/par("mai") [1] 6 6 6 6 > par("cra") [1] 6 12 > png() > par("mar")/par("mai") [1] 4.686347 4.686347 4.686347 4.686347 > par("cra") [1] 13 16 > dev.off() > pdf() > par("mar")/par("mai") [1] 5 5 5 5 > par("cra") [1] 10.8 14.4 > x11() > par("mar")/par("mai") [1] 4.686347 4.686347 4.686347 4.686347 > par("cra") [1] 13 16 The quotient gives the par margin line height in inches, par("cra") the dimensions of the characters in "rasters" (which may be close to size in points, but may differ a lot in some screens). For your alignment, I think you want to make margin proportions equal in two devices, and you must scale so figs so instead of using physically equal dimensions. The mar/mai ratio or cra does not change with device width & height, so you must change those so that for fig looks like it should. I have no ideas if this works, but I think this still is your problem... Greetings to the Moderator, Jari Oksanen Cheers, Jari Oksanen ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.