Usage

You can enable or disable module output in the System->Configuration->Advanced->Advanced->Disable Modules Output.

Once the output is enabled, you should see a blue bar above your frontend showing Handles generated by current layout. You can inspect the generated HTML and seek for <magento> tags which show information about the Blocks that compose the current Layout.

I like to use tools like Firebug to inspect code.

Generally the <magento> tags don't mess up your design.

If some CSS rules are based on direct descendance, the <magento> tag can break them but the general appearance of the web page should be preserved.

Remember to always disable this module in production environment! I suggest not deploying it at all or disabilng it through the app/etc/modules config file, setting the <active> flag to false.

That's all for now :-)