the pound sign (<kbd>#</kbd>) at any point in the string where you want an equalized amount of whitespace inserted.</li>
</ol>

<p>
The situation depicted above is accomplished like this:
<br/>
<span class="pre-in-pp">
  .HEADER_RECTO LEFT "^\*[PAGE#]#\E*[$TITLE]^"
  .HEADER_VERSO LEFT "^\E*[$AUTHOR]#\*[PAGE#]^"
</span>
Notice that the quad argument, <kbd>LEFT</kbd>, is used in both
cases.  When padding a header, it doesn&#8217;t matter which
quad argument you use, although you must be sure to supply
one.  