Thanks Hraban,

That should be fine, I've tried to increase the margins as well, but not sure that's the issue as I can perfectly place text with \inmargin directly, just not with the numbercommand.

MWE:

\starttext
\setuplayout[margin=2cm, leftmargin=2cm, rightmargin=2cm]

\showframe
\showlayout

\setupcaption[figure][location={rightmargin}]
\startplacefigure[title=Cow] \externalfigure[cow] \stopplacefigure

\define[1]\MyFormulaNumber{\inleftmargin{#1}}
\setupformula[numbercommand=\MyFormulaNumber]

\inleftmargin{Left Margin Text}
\inrightmargin{Right Margin Text}

\startplaceformula[reference=eq1] \startformula c^2 = a^2 + b^2 \stopformula \stopplaceformula
\stoptext

Adam

On Sun, Mar 21, 2021 at 8:31 PM Henning Hraban Ramm <texml@fiee.net> wrote:

> Am 21.03.2021 um 20:56 schrieb Adam Reviczky <reviczky@gmail.com>:
>
> Thanks Hraban,
>
> I've tried the numbercommand as well, but that also just makes the formula number disappear, unless I am doing something wrong.
>
> The framing as per the math manual (manuals/math/math-framing.tex) however does work, so not sure:
> \setupformula[numbercommand={\inframed[framecolor=green]}]

Are your margins actually non-zero? (\setuplayout)
Maybe check with \showlayout

Hraban
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