panels.html in Classified Ads 6.3
File
help/panels.html
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<div class="classified-help">
<p>Classified Ads exposes the ad expiration "extra-field" as a CTools content
type.</p>
<p>In practice, this means you can add it to a custom-built page in Panels
just like CCK Fields.</p>
<p>The field has two settings:</p>
<ul>
<li><code>link</code> defines whether or not the expiration "field" should
link back to the node URL.</li>
<li><code>format</code> defines the format under which the expiration
"field" should appear: either as a remaining lifetime, a remaining
percentage, an actual expiration date, or using the default formatter
used for the normal node view.</li>
</ul>
</div>