🚀 go-pugleaf

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)