How to move product specification to the bottom

Hi,

You have to edit one of the layout in order to move the wanted block.
In "Display > view", you have to edit the "product / show_...." (default, tabular, reverse) view for your front-end template.

You have to move this portion of code

<?php
if(!empty($this->fields)){
	$this->setLayout('show_block_custom_main');
	echo $this->loadTemplate();
}
?>