        if invoked, otherwise, "Chapter"
  \E*[$CHAPTER]        &mdash;the current argument (typically a number) passed
                          to .CHAPTER
  \E*[$CHAPTER_TITLE]  &mdash;the current argument passed to .CHAPTER_TITLE
</span>
Returning to the scenario above, first, you&#8217;d define a centre
string for the endnotes page:
<br/>
<span class="pre-in-pp">
  .HEADER_CENTER "Endnotes"
</span>
Then, you&#8217;d output the endnotes:
<br/>
<span class="pre-in-pp">
  .ENDNOTES
</span>
Then, you&#8217