Is this what you mean?

\starttext
Hello\footnotetext{Footnote without mark}.
\stoptext

Kind regards,
Massi

Il 18/05/22 07:55, Zhichu Chen via ntg-context ha scritto:
> Hi everybody,
>
>
> After some attempts to put footnotes in a mixed 1&2 columns layout, I
> decide to put marks in the one-column environment and flush them when
> entering the two-column environment.
>
>
> The code is ugly but the result is acceptable. Except that the invisible
> footnote marks do generate something in the main text, so there's a
> blank line for each footnote.
>
>
> Here's an MWE:
>
>
> =============================================
>
> \definenote[address]
> \setupnote[address][rule=off,location=text]
>
>
>
> \definenote[putjustmark]
> \setupnote[putjustmark][location=none]
> \setupnotation[putjustmark][numberconversion=set 2]
>
>
> \definenote[putjustnote]%[footnote] % if footnotes need to be grouped,
> uncomment the second argument and the line after \the\titlefootnotes
> \setupnote[putjustnote][textcommand=\gobbleoneargument]
> \setupnotation[putjustnote][numberconversion=set 2]
>
>
> \newtoks\titlefootnotes
>
>
> \def\thanks#1{\putjustmark{#1}\appendtoks \putjustnote{#1} \to
> \titlefootnotes}
> \def\email#1{\putjustmark{#1}\appendtoks \putjustnote{#1} \to
> \titlefootnotes}
>
>
> \appendtoks
>    \setcounter[footnote][0] % this looks stupid because it has no effect
>    %\setupnotation[footnote][numberconversion=numerals]
> \to \titlefootnotes
>
> \definenamespace
>     [addr]
>     [type=module,
>      name=address,
>      command=yes,
>      setup=list,
>      parent=addr,
>    ]
>
> \define[1]\useaddress
>      {\setnotetext[address][#1]{\namedaddressparameter{#1}{name}}}
>
>
> \starttext
>
>
>
> \defineaddress[fst][name={Name of Institute or Affiliation, City, Country}]
> \defineaddress[snd][name={Name of Secondary Institute or Affiliation,
> City, Country}]
>
> \processcommacommand[fst,snd]\useaddress
>
>
> The Title\thanks{Work supported by somebody.}
>
> Me\email{myemail@some.where}\high{,}\note[address][fst]\high{,}\note[address][snd]
>
>
>
> \placenotes[address]
>
> \blank[medium]
>
> \startcolumns
>
>
> \the\titlefootnotes
>
> %\setcounter[footnote][0] % why it's necessary to set the counter
> outside the token if I define [putjustnote] as [footnote]?
>
>
> test\footnote{test}
>
> \input knuth
>
>
>
> \stopcolumns
>
> \stoptext
>
> =============================================
>
> ___________________________________________________________________________________
>
> If your question is of interest to others as well, please add an entry
> to the Wiki!
>
> maillist : ntg-context@ntg.nl /
> http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
> archive  : https://bitbucket.org/phg/context-mirror/commits/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________
>
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
___________________________________________________________________________________