there are other places where you might want input
lines to be invisible as well.  Any place you don't want input lines
to appear in the output, use the <strong>SILENT</strong> macro.
</p>

<p>
<strong>SILENT</strong> is a toggle.  Invoking it without an argument
turns it on; any argument turns it off.  E.g.,

<pre>
    .SILENT
    A line of text
    .SILENT OFF
</pre>
</p>

<p>
The line &quot;A line of text&quot; will not appear in the
output copy.
</p>

<p>
<strong>SILENT</strong> is aliased as <strong>COM