></a></dt>
<dd><p>Either a character string naming the position function used
for the layer or a position object returned from a call to a position function.</p></dd>


<dt id="arg-show-legend">show.legend<a class="anchor" aria-label="anchor" href="#arg-show-legend"></a></dt>
<dd><p>A logical indicating whether this layer should be included in
the legends.  <code>NA</code>, the default, includes layer in the legends if any
of the attributes of the layer are mapped.</p></dd>


<dt id="arg-show-help">show.hel