In your com_properties detail configuration, what template do you use?
configuration -> file use
default -> details.php
default1 -> details1.php
default2 -> details2.php
default3 -> details3.php
if you use tabs
default -> details_tab.php
default1 -> details_tab1.php
default2 -> details_tab2.php
default3 -> details_tab3.php
in /Yoursite / components / com_properties / views / templates / '
Edit your file and find line like this :
<?php if($Product->extra11){echo '<tr><td align="right">'.JText::_('extra11') .':</td><td align="left"><img src="'.JURI::base().'components/com_properties/includes/img/icon-16-checkin.png" alt="'.JText::_('extra11') .'" /></td></tr>';} ?>
Copy this line where you want show the extra field, and change the nuber (60, 61, 62 ...)
<?php if($Product->extraXX){echo '<tr><td align="right">'.JText::_('extraXX') .':</td><td align="left"><img src="'.JURI::base().'components/com_properties/includes/img/icon-16-checkin.png" alt="'.JText::_('extraXX') .'" /></td></tr>';} ?>
