Hi Jim,

On Tue, 2025-07-15 at 10:06 -0300, Jim wrote:
> Might I ask you
> (a) To confirm that your PDF reader does, indeed, do SPR?
>     (I.e., not just everything else on your system.)
>     and

Ah, good point, I should have checked first. Using the following test
file:

    \loadtypescriptfile[plex]

    \setupbodyfont[plex-thin, sans]
    \setupinterlinespace[1sp]

    \define[1]\makeline{%
        \setupbodyfont[#1pt]%
        \dorecurse{
            \numexpression(\textwidth / \widthofstring{l}) - 1\relax
        }{l\hfill}%
        \unskip%
        \par%
    }

    \define\makelines{%
        \processcommalist[2, 4, 6, 8, 10, 11, 12, 16, 24, 36, 72]\makeline%
    }

    \startTEXpage[width=6in]
        \makelines

        \startframedtext[
            offset=0pt,
            width=broad,
            background=color,
            backgroundcolor=black,
            color=white,
        ]
            \makelines
        \stopframedtext
    \stopTEXpage

Chromium and Firefox (pdf.js) use subpixel rendering, while Evince,
Okular, MuPDF, and xpdf just use greyscale antialiasing. I usually use
Firefox to view PDFs, and everything else on my system uses subpixel
rendering, so I just assumed that the rest of the PDF viewers did as
well.

Thanks,
-- Max
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