Hi,

I'm trying to adapt the format of chapters in my document and have a few questions regarding setuphead.
My aim is to have the chapter (title) on a separate page with an additional intro in different text sizes for title, subtitle and the intro.
I chose to use the "command=" argument in setuphead for that.
However, I'm not quite sure about it's internals.

Let's begin with a minimal example:
```
\define[2]\MyChapter{%
	#1 #2: \structureuservariable{subtitle} (\structureuservariable{intro})
}

\setuphead[title, chapter][command=\MyChapter]

\setupbodyfont[11pt]

\starttext
\startchapter[title=foo][subtitle=bar, intro={some explanation}]
some text
\stopchapter
\stoptext
```
This produces 1.pdf.


## Font size

What is the reason that that the font of the chapter is bigger? How can I reset it to normal size? This does not work at all:
```
\define[2]\MyChapter{%
	\setupbodyfont[11pt] #1 #2: \structureuservariable{subtitle} (\structureuservariable{intro})
}
```
However, changing to a bigger font works somehow. Is there a factor applied to the font size internally? For example:
```
\define[2]\MyChapter{%
	\setupbodyfont[20pt] #1 #2: \structureuservariable{subtitle} (\structureuservariable{intro})
}
```
produces 2.pdf (the chapter font is not 20pt).


## Line breaks

How can I achieve line breaks?
This does not work:
```
\define[2]\MyChapter{%
    #1 #2:\\
    \structureuservariable{subtitle}\\
    (\structureuservariable{intro})
}
```
(see 3.pdf)

I also want to set everything except of the intro in a flushright environment but do not know how. I tried:
```
\define[2]\MyChapter{%
    \startalignment[flushright]
        #1 #2:\\
        \structureuservariable{subtitle}\\
    \stopalignment
    \structureuservariable{intro}
}
```
(see 4.pdf, no change)


## Bold text

I tried to get the text bold. However, `#1` and `#2` does not seem to follow this.
```
\define[2]\MyChapter{%
    \bold #1 #2: \structureuservariable{subtitle} (\structureuservariable{intro})
}
```

## Makeups

The best solution, I had so far, was to define a makeup, but I don't get it to work with text with mixed alignment and it does not solve the font size problem:
```
\definemakeup[chapter][align=left, top=]
\define[2]\MyChapter{%
    \startmakeup[chapter]
        #1 #2:\\
        \structureuservariable{subtitle}\\
    \stopmakeup
    (\structureuservariable{intro})
}
```
(see 5.pdf)

## Framed

I also have tried this but it does not bring any linebreaks:
```
\define[2]\MyChapter{%
    \framed[frame=off, offset=0pt]{#1\\#2:\\ \structureuservariable{subtitle}\\ (\structureuservariable{intro})}
}
```
(see 6.pdf)

I hope you can shed some light into setuphead with command. I search on the wiki, Stackoverflow and the manuals but didn't really find anything.

Best,
Gerion