After much searching, my probably laughable attempt consists of combining
the answer to the question at
https://tex.stackexchange.com/questions/433110/setting-page-attributes-of-ev...
with
what I can see in the source at
https://source.contextgarden.net/tex/context/base/mkiv/lpdf-mis.lua:
\appendtoks
\startluacode
local formatters = string.formatters
local pdfverbose = lpdf.verbose
local pdfarray = lpdf.array
local factor = number.dimenfactors.bp
local f_value = formatters["\letterpercent.6N"]
local function boxvalue(n)
return pdfverbose(f_value(factor * n))
end
lpdf.addtopageattributes("TrimBox", pdfarray {
boxvalue(30),
boxvalue(30),
boxvalue(180),
boxvalue(267),})
\stopluacode
\to \aftereverypage
This code throws no errors, but unfortunately it also has no effect. What
am I doing wrong?
Jack
On Sat, 25 Apr 2020 at 22:37, Jack Steyn
Hi,
I am having trouble setting the PDF boxes to my desired dimensions. Suppose I have \setuppapersize[*a*][*b*]. I want CropBox = MediaBox = *b*. So far, so good: I can just use cropoffset=0mm in \setuplayout. But I want TrimBox = *a*. However, as far as I can see, I can't achieve this using trimoffset in \setuplayout unless (width of *b*) – (width of *a*) = (height of *b*) – (height of *a*), which does not hold in my case. So it looks like I need to find another way to set the TrimBox (and the BleedBox, which I want to be 3mm wider and taller than the TrimBox). Does anyone know how to do this?
Best,
Jack