I guess you can always use a good old markup injection filter, like the one attached.

Den tors 21 juli 2022 15:38William Lupton <wlupton-QSt+ys/nuMyEUIsrzH9SikB+6BGkLq7r@public.gmane.org> skrev:
OK.

Does that description imply that this only works for HTML output? If so then that's different from underline and small caps, which both say:

This will work in all output formats that support XXX.


I took a stab at this. PR #8191.
On Thursday, 21 July 2022 at 08:58:55 UTC-4 Albert Krewinkel wrote:
William Lupton <wlu...-QSt+ys/nuMyEUIsrzH9SikB+6BGkLq7r@public.gmane.org> writes:

> Albert, is .mark documented in the manual? I didn't see it. Presumably
> it could/should have a short section near the existing underline and
> smallcaps sections. Tx, W.

I believe the only mention is in the changelog of version 2.8:

> Render a Span with class mark using the <mark> element (Florian
> Beeres, #5797).

You are probably right about having this documented, although the line
between feature and implementation detail is a bit blurry here. Would
you like to create a PR?

--
Albert Krewinkel
GPG: 8eed e3e2 e8c5 6f18 81fe e836 388d c0b2 1f63 1124

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