Hi, when I create huge pdf files (width is 6meters) with R I cannot open them in Adobe Acrobat reader (I tried version 9 and some lower). I use pdf() of grDevices version 2.8.1 and CairoPDF from Cairo version 1.4-4. When I add the (perhaps since pdf version 1.7 pagesizes of more than 200in are possible?) version="1.7" I get an error ("ung?ltige PDF Version") from pdf() and no error from CairoPDF() (but it is ignored). I use R version 2.8.1. How can I make version 1.7 pdf files to make these big files view- and printable? Thanks Thomas PS: To make it quick, the IMHO crutial part of the ?pdf help: The version argument declares the version of PDF that gets produced. The version must be at least 1.4 for semi-transparent output to be understood, and at least 1.3 if CID fonts are to be used: if these features are used the version number will be increased (with a warning). Specifying a low version number is useful if you want to produce PDF output that can be viewed on older or non-Adobe PDF viewers. (PDF 1.4 requires Acrobat 5 or later.)