Let’s see what advantages Magento debug tools give us.

1. With the help of Debug tools you can see the module system name and core file:

To enable the debug tools, open the Magento admin panel, go to System > Configuration page. In the Current Configuration Scope block (left column top block) select Default Store View:

3. Now scroll down and click the Developer link and open the Debug tab.

4. For the options Template Path Hints and Add Block Names to Hints uncheck the Use default checkbox and select ‘Yes’. Then click Save Config button in the top left corner: