Yeah it knows it's printing A4, but it can't print edge-to-edge, if you print a black rectangle the white borders are not a uniform size. If you created a docu

Yeah it knows it's printing A4, but it can't print edge-to-edge, if you print a black rectangle the white borders are not a uniform size. If you created a document using an A4 template and measured objects within this document using millimetres, when printed the objects would not be printed at exactly that size. I know this because I've tried to do exactly that, and tried various permutations - on my specific printer I found that the warping was sometimes non-linear along the vertical axis! Maybe I've just got a particularly crap printer... Oh, Brother!