1. backend
root\administrator\components\com_content\admin.content.html.php
line 833
<tr>
<td>
<label for="sectionid">
<?php echo JText::_( 'Images' ); ?>
</label>
</td>
<td>
<?php echo $lists['images']; ?>
</td>
<td>
</td>
<td>
</tr>
root\administrator\components\com_content\controller.php
line 450
function editContent($edit)
$lists['images'] = '<input type="text" value="'.$row->images[0].'" maxlength="255" size="100" id="images" name="i" class="inputbox">';
line 565
function saveContent()
$getImages = JRequest::getVar( 'images', null, 'post', 'array' );
$row->images = $getImages[0];
or use page breaker as a summary / article separator
2. frontend
root\templates\theme-green\html\com_content\category\default_items.php
var_dump($item->images); //list layout
root\templates\theme-green\html\com_content\category\blog_item.php
var_dump($item->images); //blog layout
root\templates\theme-green\html\com_content\section\blog_item.php
var_dump($this->item->images);
3. blog page
we could use (Menu Item - Parameters (System) - Page Class Suffix) and css to control the style of single blog page