Just curious why would you want to? Either way to answer your question you have to enable debug mode which stays on all the time and isn't recommended.
Also mentioned in the FAQ here on XenForo.com.
How do I enable debug mode?
Edit the /library/config.php file to add the following line: $config['debug'] = true;
Note that it is not advised to run a live site with debug mode enabled due to the increased resources required.
Just curious why would you want to? Either way to answer your question you have to enable debug mode which stays on all the time and isn't recommended.
Also mentioned in the FAQ here on XenForo.com.
How do I enable debug mode?
Edit the /library/config.php file to add the following line: $config['debug'] = true;
Note that it is not advised to run a live site with debug mode enabled due to the increased resources required.