On 6/30/2022 10:36 AM, Max Chernoff via ntg-context wrote:

If you load the Plex typescript, a spurious space is added on the first switch to another font, messing up any alignment. This doesn't happen with any other fonts; only with Plex.

MWE:

    \setuphead[section][style={\switchtobodyfont[modern]}]     \setupbodyfont[plex]

    \starttext         \section{A}         A     \stoptext

I was able to fix this by removing the space immediately before the "%" on line 136 of "type-imp-plex.mkiv", changing it from this (original):

\definefontfeature[plexwideneddefault][default][extend=\luaexpr{1/0.85}] % An odd floating point number to correct monospace.

to this (fixed):

\definefontfeature[plexwideneddefault][default][extend=\luaexpr{1/0.85}]% An odd floating point number to correct monospace.

I'm pretty sure that TeX is ignoring spaces at this point, so I have no idea why this issue exists or why the fix works. when you trigger modern it will also process a typescript and that can itself have spaces introduced

just preload it, as in: \usebodyfont[modern] \setupbodyfont[plex] \setuphead [section] [style={\switchtobodyfont[modern]}] \starttext \section{A} A \stoptext ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------