Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!mcsun!ukc!icdoc!qmw-cs!liam From: liam@cs.qmw.ac.uk (William Roberts) Newsgroups: comp.lang.postscript Subject: Re: Imageable area change ? Message-ID: <2350@sequent.cs.qmw.ac.uk> Date: 7 Jun 90 20:56:01 GMT References: <3399@ruuinf.cs.ruu.nl> Organization: Computer Science Dept, QMW, University of London, UK. Lines: 43 Worse still, the imageable area determined by the electronics controlling the laser is likely to be different from the area withint which PostScript is prepared to put the dots. Try the following bit of code to see if this is true for your printer: clippath gsave 0.75 setgray fill grestore 14 setlinewidth 0 setgray stroke showpage This should fill the page in grey and print a 0.2 inch wide block border centred on the current PostScript clipping path. Since you do this when the clipping path is the boundary of the page and hence defines the imageable area, the outer 0.1 inches of the line will be clipped off by the PostScript interpreter. The inner 0.1 inch will remain. Do this on the LaserWriter plus and I expect that you will find that the black line is thinner than it should be along one or more edges. If anyone out there can tell me how to adjust the electronics to fix this please let me know: I have been asking this question for nearly 4 years without any sensible answers. It must be possible - try putting sticky tape over the notches in the side of your paper tray and watch the machine print right over the edge... Added confusion: in early versions of the PostScript interpreter, the setmargins operator actually changed the meaning of (0,0) in the default coordinate system, so you could use setmargins to move the imageable area into the part of the page where the LaserWriter plus would agree to make black marks on the paper. However, in the last version of the interpreter included in the LaserWriter+ before the NT range took over, this had been changed so that (0,0) stayed as the bottom lefthand corner of the paper. -- William Roberts ARPA: liam@cs.qmw.ac.uk Queen Mary & Westfield College UUCP: liam@qmw-cs.UUCP Mile End Road AppleLink: UK0087 LONDON, E1 4NS, UK Tel: 071-975 5250 (Fax: 081-980 6533)