I'm not quite sure how you want your footnotes to look like and what
to indent. You find further information on the Wiki -
Footnotes.
Use the \setupnotation [footnote] command to adjust the
layout, here are some examples.
%% left align the footnote number and shift the footnotes
\setupnotation
[footnote]
[alternative=left]
%% indents the entire footnote by 2em and the number by 1em
\setupnotation
[footnote]
[alternative=left,
width=2em,
numbercommand=\hskip1em]
%% left align the footnote number, which practically indents the
%% first line
\setupnotation
[footnote]
[alternative=left,
hang=1]
%% Indents the first line inclusive the footnote number
\setupnotation
[footnote]
[alternative=left,
numbercommand=\hskip1cm]
%% Indents all footnotes and right-aligns the number
\setupnotation
[footnote]
[alternative=left,
headalign=flushright,
width=2em]
Full example:
\setupnotation
[footnote]
[alternative=left,
hang=1,
numbercommand=\hskip1cm]
\starttext
Lorem \startfootnote
\input ward
\stopfootnote
Ipsum \startfootnote
\input ward
\stopfootnote
\stoptext

\setupnotation[footnote][indenting={small,yes}]. – phg Oct 16 '12 at 7:58