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.
Cheers.
Jim
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