[NTG-context] was: figuretext problem --- is: how to modify (presentation) styles

[Mojca Miklavec]

Hans Hagen wrote:
> Matthias Weber wrote:
> 
>> Thanks Hans, this was most helpful!
>>
>> I have another question, though:
>> After looking at various 'built-in' documentation styles I am 
>> wondering about the best way
>> to modify one of these. I couldn't find any documentation besides how 
>> to use the
>> styles as they are. So, if I want to make (say) the "green style" blue 
>> and with smaller buttons,
>> are there setups for this? If yes, do I learn about these by looking 
>> at the source, or,  if no,
>> do I copy the source and try my best to mess around with it?
> 
> 
> just overload them in your own style:
> 
> yourstyle.tex :
> 
> \usemodule[pre-green]
> 
> .. your modufications ..
> 
> 
> yourdocument.tex:
> 
> \environment yourstyle
> 
> .. the text ..

I didn't figure out yet how to know which s-pre-xx.tex defines which 
style, but if you want to use and modify the green one, take a look at 
s-pre-02.tex or even better: general/sources/s-pre-02.pdf at pragma-ade 
website. The documentation there is not visual (like in other manuals), 
but pretty self-evident for someone with at least some minimal 
experience with ConTeXt.

To change the background color, after finding the following line in 
s-pre-02.tex:
    \definecolor [OrnamentColor]    [r= 0, g=.7, b=.4]

it is not difficult to guess that an additional line anywhere at the 
beginning of your document or style file, like:
    \definecolor [OrnamentColor]    [r= 0, g=.4, b=.7]
will change the color from green to blue.

To get smaller buttons, notice the \bottomheight used overall where the 
buttons are drawn. (In page-run.tex you can see that that 'bottom' is 
resposnsible to set the proper bottomheight.) So
    \setuplayout[bottom=.4cm]
should solve your problem. If you want to change the look of buttons 
more dramatically, simply copy and modify the lines:

\startuniqueMPgraphic{RightArrow}{height}
...
\stopuniqueMPgraphic

You can try to play with single portions of settings. A very beautiful 
thing in TeX is that one definition simply overloads the other, so it's 
not too difficult to modify a properly designed style.

Regards, Mojca Miklavec