Q:

How to divide paper up into smaller pages in ConTeXt?

I need to create some cards, of various sizes, cut from larger letter (8.5" x 11") pages. These are for putting in different sized pocket charts for displaying information in a classroom.
All are fairly simple, with header (just like on regular pages) plus some large, vertically and horizontally centered text. Here are some sample layouts:
These cards measure 8.5" x 5:
 _____________________
| Header              |
|                     | <--page 1
|    Centered text    |
|                     |
|---------------------|
| Header              |
|                     | <--page 2, but would be printed on same paper
|    Centered text    |
|                     |
|_____________________|

These cards measure 11"x4" in landscape mode and the bottom 0.5" is discarded:
 __________________________
| Header                   |
|       Centered text      |
|--------------------------|
| Header                   |
|       Centered text      |
|--------------------------|
|__________________________|

Is there a way to have ConTeXt setup the pages this way? A simple \pagebreak command would send documents to the next "page" while still being on the same physical page when printed, and headers appear on top like normal. Cuttings lines aren't needed, as I can measure on a paper cutter to get the cuts right.

A:

You could use ConTeXt's imposition mechanism.  The examples have to be typeset using context --arrange.
\setuparranging[2TOP]

\definepapersize
    [card]
    [height=5in,width=8.5in]

\setuppapersize
    [card]
    [letter]

\definemakeup
    [custom]
    [align=middle,headerstate=start]

\setupheadertexts[Header][]

\showframe

\starttext

\startmakeup[custom]
    Centered text
\stopmakeup

\startmakeup[custom]
    Centered text
\stopmakeup

\stoptext

For the second layout just replace in the above
\definepapersize
    [card]
    [height=4in,width=11in]

\setuppapersize
    [card]
    [letter,landscape]

