Headers across the margin and text area

["Duncan Hothersall" <dh@capdm.com>]

Hi,

I'm very new to ConTeXt so my apologies if this question displays my
ignorance.

I am implementing an existing A4 book layout, double-sided with a wide left
margin used for notes and exercises. I am trying to redefine the headers so
that the titles of sections, etc. are set across the whole page including
the margin. If you're viewing in a fixed width font, this is what I mean:

1.1 This is a section title
         Paragraph text appears here
         as normal. Notes and exercises
         will go into the margin on the
         left of the page.

All I have managed to do so far is to get the numbering to appear in the
margin. Is there any way to get the title text to start in the margin as
well? (I'm aware that one approach would be to set the text in two columns,
but I think using the existing margin facilities in ConTeXt should make
things much more coherent in the long run, if it can be done.)

Another question, in a similar vein: I'd like the headers and footers to run
the full width of the page too (i.e. the text area and the margin). The only
way I've managed that so far has been to \setuppagenumbering
[alternative=doublesided]. Unfortunately that made my margin alternate on
odd and even pages, and I need the margin always to be on the left. Is there
an obvious combination of \setup[..] type commands that can do this?

I hope that's enough information for somebody to help me out. Thanks in
advance,

Duncan

PS. I have the 13 English chapters of the manual, plus the beginners guide
and the commands list. Is there any other English language documentation I
should know about? Thanks.