Thank you so much! The piece I was missing was the "placehead=yes". Now everything works as expected! I couldn't figure out how to increase letter spacing for the "style" argument using just a \definefont macro, but I was able to do it with a macro supplied as the "textcommand" argument.

Joey

On Fri, Aug 6, 2021, 1:54 PM Pablo Rodriguez via ntg-context <ntg-context@ntg.nl> wrote:
On 8/6/21 7:12 PM, Joey McCollum via ntg-context wrote:
> Hi,
>
> I'd like to define my own class of heading derived from the "part"
> heading; in the MWE below, it's called "MyPart".

Hi Joey,

these are options for \setuphead[part] (MyPart in your case):

> I'd like this heading to have the following features:
>
>   * Its title should appear in the ToC, but its number should never be
>     printed in the ToC or in the text.

number=no.

>   * It should always start on an odd page.

This is the default for \setuphead[part] (only noticeable in doublesided
documents).

>   * Its text should be in a larger size than the text of the body, set
>     in all caps, and set with extra letterspacing.

style is the right option there.

>   * Most importantly, the title of the heading should appear on its own
>     page without a header or footer. The text of the body should begin
>     on the next odd page.

placehead=yes is required for \setuphead[part]. And also for MyPart.

header=empty and footer=emtpy. For the page break before the body text,
you need after=\page.

> I was hoping to accomplish all of this within the \setuphead command,
> and it seems like this should be possible, but in the following example,
> I'm not getting the text of the header at all.

See above. I hope it helps,

Pablo
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