There are two ways to enable debug mode in prestashop:
	
		
replace false with true to enable debug mode.
	
	
	
		
save the changes
								- Enable it in Prestashop admin panel
 - Enable it manually
 
- First login to admin panel.
 - Choose Advanced Parameters and then Performance.
 - Now you will see Debug mode section, you have to set Debug mode Yes.
 - Save the changes.
 
- First edit the file which is available at config/defines.inc.php location.
 - Now find below code:
 
		Code:
	
	define('_PS_MODE_DEV_', false);
	
		Code:
	
	define('_PS_MODE_DEV_', true);