On 2014–01–19 Pablo Rodriguez wrote:

> on a document I have, I want to have footnotes in appendices, but they
> are numbered in uppercase Roman numbers. Here is a sample:
> 
> \starttext
> \startappendices
> a\footnote{b.}
> \stopappendices
> \stoptext
> 
> How can I change it to Arabic numbers?

  \setupnotation
    [footnote]
    [numberconversion=numerals]

> I would be also interested to know how to change chapter and
> section numbers only for appendices.

  \definestructureconversionset
    [structure]
    %% part,  chapter,    section,       subsection, subsubsection
    [numbers, characters, Romannumerals, numbers,    romannumerals]
    [numbers]

  \startsectionblockenvironment [appendix]
    \setupheads [sectionconversionset=structure]
  \stopsectionblockenvironment

Marco