# [NTG-context] Re: howto overlayers on section head

Hello,

[...]

> hope this back and forth will not be just a waste, but something out
> of which we can both/all learned to improuve.

I think so, too. It has been a long time since I used ConTeXt. So I
have to refresh my rusty knowledge :-)

> "define your own command" , but you have to know THE (default) command
> fist, otherwise it is hard to obtain a result (.pdf) from something
> that is not just a copy of someonelse .tex

Right, but I'd guess that the default command is quite tricky. All
ConTeXt commands are quite tricky.

>          {\hfil%
>       {#1#2}\hfil}}
>
>
> \starttext
> \chapter{ciao}
> \stoptext
>
> the two ex-s  are not the same , because spacing between the number
> and the title and allignment, why?

There is no horizontal "space" command between #1 (number) and #2
(title). But "space" is not just a simple " ". It can be many things.
I don't know if there is any good reading about these kind of spaces,
but let me show you a few:

( )        regular space is pretty small, but can be stretched
\enspace   fixed space 0.5em
\enskip    space .5em      (so called "skip")
\kern xx   space xx
\hfil, \hfill  "very long" and "very very long" space

> Moving your howto overlay example, indeed very useful, from subject to
> chapter seems to me more subtle than just changing  section names

It is more a matter of section numbers/no section numbers.

Patrick

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