ADER_MARGIN, and establishes
the baseline position of footers relative to the bottom edge of the
page.
</p>

<p>
The distance between headers and the start
of running text can be controlled with the macro
<a href="#hdrftr-gap">HEADER_GAP</a>,
effectively making HEADER_MARGIN + HEADER_GAP the top margin of
running text unless you give mom a literal top margin (with
<a href="typesetting.html#t-margin">T_MARGIN</a>)
or
<a href="typesetting.html#page">PAGE</a>,
in which case she ignores HEADER_GAP and begins th