Am 01.06.2026 um 17:25 schrieb Jim via ntg-context:
On Sun, May 31, 2026 at 13:21 (+0200), Wolfgang Schuster wrote:
Am 31.05.2026 um 12:49 schrieb Hans Hagen via ntg-context:
On 5/31/2026 12:05 PM, Pablo Rodriguez via ntg-context wrote:
On 5/28/26 02:39, Jim via ntg-context wrote:
Hi all,
[…]
What do I learn from this?
(a) Fractional point font sizes are not a thing, and I shouldn't
do that?
(b) Fractional point font sizes may work, but are unreliable?
(c) \switchtobodyfont[script] doesn't work with fractional point
font sizes?
(d) Something else entirely?
Hi Jim,
just use the source: lines 654-662 from contain the explanation (or I
just found the fix reading those lines).
If you use non-predefined font sizes (not just fractional, `50pt` gives
the same result), it seems that you have to setup the size.
Your sample compiles fine, even with such an unorthodox approach such as:
\definebodyfontenvironment[10.5pt]
[script=\cldcontext{10.5*(7/12)}pt]
\setupbodyfont[10.5pt]
I hope it helps,
In mkii times there we limnitation son the amount of fonts so we snapped
sizes to 2 digits. In mkiv times that was less needed but still we snap
in order not to get excessive definitions due to 'interesting usa
cases'. In lmtx we scale differently but still one needs to be careful
esp as bodyfont environments are expected to behave consistently.
In principle we could discard some compatibility here but that is always
tricky and as such some work from Wolfgang and me that we currently
happily delay. Of course there are sentimental reasons for such a delay
too.
An easy way to fix this problem is to limit the number of allowed keywords
to small and big.
%%%% patch for font-ini.mklx
% macros=mkvi
\unprotect
\protected\def\font_basics_switchtobodyfont#specification%
{\edef\m_font_step{\font_bodyfontvariable{#specification}}%
\font_push_x_size % experiment
\ifempty\m_font_step
\font_helpers_set_font\zerocount{#specification}%
- \else
+ \orelse\ifinset{#specification}{\v!small,\v!big}%
\font_helpers_switch_bodyfont_step % so we have a fast [small] switch
\fi
\expand\everybodyfont
\expand\everyswitchtobodyfont
\expand\everyfont
\expand\everyfontswitch
\font_pop_x_size % experiment
}
\protect
\starttext
text
\switchtobodyfont[script]
text
\switchtobodyfont[10.5pt]
\switchtobodyfont[script]
text
\switchtobodyfont[small]
text
\stoptext
%%%%
Wolfgang,
thanks, that does the trick in removing the error the 10.5pt/script
situation.
However, in my test it seems to ignore \switchtobodyfont[script] for the
default font size. Is this intended?
Perhaps getting an error message when asking for some undefined size like
this is the correct thing, and the only requirement is a bit of education
for users like me.
AFAIK script (and scriptscript) isn't meant as a named size switch and
only used in math mode.
\setupbodyfontenvironment[30pt][script=25pt,scriptscript=20pt]
\setupbodyfont[30pt]
\starttext
\dm{a_{\text{b}_{\text{c}}}}
\setupbodyfontenvironment[30pt][script=20pt,scriptscript=10pt]
\dm{a_{\text{b}_{\text{c}}}}
\stoptext
Wolfgang
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