Unable to enable theme debugging I am trying to figure out which template file is used in a page and I stumbled upon this variable to enable in the setting.php

$conf['theme_debug'] = TRUE;


I did enable the variable in the settings.php and in default.settings.php (what is the difference actually?), but with no luck on seeing the generated output in the markup. And of course cleared the caches several times.

So am I really blind to the generated output? Where does it actually generates?
Permissions issue. That simple. And I wasn't noticing it.

setting.php file has read only permissions (444) by default. So I changed to 644 permissions and that's it.