Hi Hans, using that produces a pdf which fails compliance with PDF/X-1a as the BleedBox is not set. But notice that if it did work, the sizes of TrimBox and BleedBox would be based off printpaperwidth and printpaperheight. I need them to be based off paperwidth and paperheight (for my documents all have printpaperwidth – paperwidth ≠ printpaperheight – paperheight).

(Apologies, I initially replied to just you and not the list as well.)

On Fri, 1 May 2020 at 05:44, Hans Hagen <j.hagen@xs4all.nl> wrote:
On 4/30/2020 5:51 PM, Jack Steyn wrote:
> Hello, I'm happy to report that I got this working after much trawling
> through the source and documentation. The code below produces a pdf with
> the MediaBox, CropBox, BleedBox and TrimBox all in the places I
> specified in my original message. I hope it helps illustrate how to set
> these PDF boxes using Lua. I would much appreciate any feedback on how
> the Lua code can be cleaned up or made more flexible (the bleed is
> hard-coded in because I didn't know how to obtain the user-specified
> bleedoffset, for example), or made better in any other way.
can you try this

\setuplayout
   [cropoffset=30pt,
    bleedoffset=20pt,
    trimoffset=10pt]

\setupinteractionscreen
   [width=max,height=max]

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