On Tue, 6 Aug 2013, Wolfgang Schuster wrote:


Am 06.08.2013 um 16:09 schrieb Alan BRASLAU <alan.bras...@cea.fr>:

Thank you Wolfgang, but I was wondering about the standard \startnarrower.

Many (some) commands allow setup assignments, the use of which overides but 
does not change the default. This is a very useful feature of ConTeXt that 
suggest could be generalized. \startnarrower is but one example.

Changing the command is simple but I would drop the second
argument when you want to change the left/right etc. values
because you can say “left=4cm” etc. to get the desired margins.

startnarrower has a weird interface. Ideally, it should just support keywords:

\startnarrower
    [
      leftmargin=...,
      rightmargin=...,
      alternative=(left|right|both),
      spacebefore=....,
      spaceafter=....,
      indenting=....,
      indentnext=....,
      before=....,
      after=....,
    ]

Aditya
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