Jack Steyn schrieb am 30.04.2020 um 16:36:

If I want to get the paper width and height to use in some Lua code, I can use:

local paperwidth, paperheight = backends.pdf.codeinjections.getpagedimensions()

But what if I want to get the page width and height? That is, the width and height of the first argument in the two-argument version of \setuppapersize. Does anyone know how I can obtain these using Lua?

You can use tex.dimen[...] or tex.dimen.<NAME> but all values are in scaled points. \setuppapersize[A5][A4] \setuplayout[location=middle] \showframe \starttext \startluacode local pagedimensions = { "paperwidth", "paperheight", "printpaperwidth", "printpaperheight", } context.starttabulate() for _, pagedimension in next, pagedimensions do context.NC() context.Word(pagedimension) context.NC() context((number.tomillimeters(tex.dimen[pagedimension],"%.F%s"))) context.NC() context.NR() end context.stoptabulate() \stopluacode \stoptext Wolfgang